Each type involves different procedures, different IRS personnel, different scope, and different stakes. Identifying which type of audit you are facing is the first defensive step in any examination.

This article walks through the three audit types from the inside — how they are conducted, who staffs them, what issues each tends to involve, and what each one signals about the IRS’s interest in the case.

The perspective is informed by Kugelman Law attorney Otto Bosch, who served as a Revenue Agent in the IRS Global High Wealth Group within the Large Business and International (LB&I) Division before joining the firm in February 2026. For broader background on how Revenue Agents operate, see our companion articles on what an IRS Revenue Agent does and inside the IRS audit playbook.

Why the Type of IRS Audit Matters

The type of audit determines almost everything else about the examination. Correspondence audits are conducted through the mail, generally by tax examiners working from IRS Service Centers, and typically focus on narrow, document-driven issues.

Office audits are conducted in person at IRS offices, generally by Tax Compliance Officers, and cover a broader scope.

Field audits are conducted at the taxpayer’s place of business or representative’s office, generally by Revenue Agents, and are the most substantive type — often involving multi-year examinations of complex returns.

The differences matter for three reasons:

Procedurally, the workflows, timelines, and document expectations differ significantly across types.

Substantively, the issues likely to arise differ based on the audit type. A correspondence audit is rarely the right vehicle for a complex partnership examination. A field audit is rarely opened for a missing 1099.

Strategically, the level and type of representation appropriate to each varies. A correspondence audit may be handled directly by the taxpayer or the preparer. A field audit conducted by an LB&I Revenue Agent almost always requires experienced controversy counsel.

Correspondence Audits

A correspondence audit is conducted entirely through written communication, typically initiated by a letter from the IRS — often a CP2000 notice or a similar document — that identifies a specific discrepancy and requests substantiation or explanation.

Who conducts them. Correspondence audits are generally handled by tax examiners at IRS Service Centers, working through the Automated Underreporter (AUR) program or similar automated functions. The taxpayer typically does not have a single named agent to communicate with. Replies go to a Service Center, where a different reviewer may process each response.

Typical issues. Correspondence audits focus on narrow, well-defined issues that can be resolved through document production:

• Information matching mismatches (a 1099 the IRS received but does not match the return)
• Missing or incorrect Social Security numbers for dependents
• Earned Income Tax Credit eligibility verification
• Education credit substantiation
• Itemized deduction verification on a single category (charitable contributions, medical expenses)
• Simple math errors or credit calculation questions

Scope. Limited and pre-defined. The IRS letter identifies what is being examined and (usually) limits the inquiry to that issue.

Risk profile. Correspondence audits are not low-stakes by default — many produce significant adjustments — but the risk of unbounded expansion is lower than with office or field audits. The greater risk is mishandling: failing to respond by the deadline, responding incompletely, or responding in a way that creates new issues.

When to engage counsel. Most correspondence audits do not require attorney involvement. They can typically be handled by the taxpayer directly or by the return preparer. Counsel is appropriate where the dollar amounts are significant, where the underlying facts touch on potential criminal exposure, or where the correspondence audit appears to be a precursor to a broader examination.

Office Audits

An office audit is conducted in person at an IRS office, typically as a single appointment lasting several hours to a full day. The taxpayer (or representative) brings requested documents to the appointment and meets with the examiner to address specific issues.

Who conducts them. Office audits are generally conducted by Tax Compliance Officers (TCOs), though Revenue Agents may handle some office examinations. Unlike correspondence audits, the taxpayer has a single named examiner with whom communications occur.

Typical issues. Office audits address moderately complex issues that benefit from in-person review:

• Schedule C examinations of self-employed taxpayers
• Schedule E rental property issues
• More complex itemized deduction questions (including travel and entertainment substantiation)
• Multi-year individual return issues
• Credit eligibility questions requiring document review

Scope. Broader than correspondence audits, narrower than field audits. The IRS will typically issue an Information Document Request before the appointment listing the specific documents and issues to be examined.

Risk profile. Office audits carry meaningful risk of expansion. Issues identified during the appointment can lead to follow-up examinations, related-return pickups, or escalation to a field audit if complexity warrants. Statements made during the appointment become part of the examination record.

When to engage counsel. Office audits frequently benefit from representation, particularly where the issues are substantive, the dollar amounts are meaningful, or the taxpayer is uncomfortable with the prospect of in-person examination by a trained IRS employee. CPAs and EAs can represent in office audits; attorneys add the privilege protection and litigation backstop that matter in more complex cases.

Field Audits

A field audit is the most comprehensive type of IRS examination. It is conducted in person at the taxpayer’s place of business, the representative’s office, or another location convenient to the examination, and typically extends over months — sometimes years — rather than days.

Who conducts them. Field audits are conducted by Revenue Agents. The division and specialization of the Revenue Agent reflects the type of case:

• Small Business / Self-Employed (SB/SE) Revenue Agents handle most individual and small-business field audits
• Large Business and International (LB&I) Revenue Agents handle complex corporate, partnership, and high-net-worth examinations
• The Global High Wealth Group within LB&I handles the most specialized examinations of the wealthiest U.S. taxpayers, using an enterprise audit approach that considers entire structures of related entities and transactions

Typical issues. Field audits address the most complex tax issues:

• Multi-year individual and business return examinations
• Partnership and S-corporation issues, including basis disputes and related-party transactions
• High-net-worth taxpayer examinations involving multiple entities and structures
• Cryptocurrency examinations of active traders, NFT participants, and DeFi users — covered in our article on inside an IRS cryptocurrency audit
• Foreign account and offshore disclosure matters
• Allegations of fraud or willful conduct
• Industry-specific examinations conducted as part of LB&I campaigns

Scope. Field audits typically cover one or more complete tax years, with the agent reviewing the return in its entirety rather than focusing on a single issue. Multiple Information Document Requests are issued over the course of the examination, with the scope evolving as issues develop.

Risk profile. Field audits represent the IRS’s most resource-intensive examination type. By the time the IRS opens a field audit, the agency has decided the case is worth investing significant time and analytical resources in. Cases conducted under the Global High Wealth Group’s enterprise approach use multiple specialists and consider the full web of related entities and transactions.

When to engage counsel. Field audits — particularly those conducted by LB&I or the Global High Wealth Group — almost always benefit from experienced tax controversy counsel. The combination of substantive complexity, multi-year scope, specialized examiner training, and significant dollar exposure makes attorney representation the appropriate default. Where there is any potential for criminal exposure or aggressive penalty positions, attorney representation is essential. We covered this calculus in detail in our article on tax attorney vs CPA for IRS audit defense.

Where the Three Types Overlap and Where They Don’t

A few important nuances apply across all three audit types:

The taxpayer’s legal rights are the same in each type. The right to representation, the right to obtain a copy of the audit report, the right to appeal proposed adjustments, the right to challenge a notice of deficiency in U.S. Tax Court — these rights do not vary based on whether the audit is conducted by correspondence, in an office, or in the field.

The substantiation rules are the same. Section 274(d) substantiation requirements for travel and entertainment expenses, basis documentation requirements, charitable contribution substantiation under Section 170 — these requirements apply identically across audit types. The differences are in how and how rigorously they are tested.

Audits can convert from one type to another. A correspondence audit that uncovers complexity can be escalated to an office or field audit. An office audit that surfaces issues outside the original scope can become a field audit. A field audit that develops potential criminal exposure can be referred to IRS Criminal Investigation. Recognizing the signals that an audit is converting type is one of the most valuable defensive insights — and it is precisely the kind of inside-the-IRS perspective that comes from prior IRS service.

How the Type of Audit Shapes Defense Strategy

Defense strategy in any IRS examination begins with correctly identifying the type of audit, the IRS division conducting it, and the specific examiner’s training and authority. From there, several principles apply:

For correspondence audits, the defense priority is responsiveness and accurate document production. Missing the deadline, providing incomplete responses, or volunteering information not requested are the most common errors. Where the issue can be cleanly substantiated, a focused response often produces a no-change closing.

For office audits, the defense priority is preparation. The single in-person appointment is where the audit’s record is largely built. Pre-appointment review of documents, anticipation of likely questions, and preparation of organized exhibits typically determine the outcome. As discussed in our article on how to respond to an IRS IDR, the appointment is not the time for improvisation.

For field audits, the defense priority is methodology. Multi-year, multi-issue examinations require sustained, organized, document-driven defense across months or years. The record built during the field audit is the record that follows the case to Appeals, to U.S. Tax Court, and through any subsequent litigation. This is the type of audit where the inside-the-IRS perspective of a former Revenue Agent — the focus of our article on why a former IRS revenue agent attorney changes audit defense — most directly changes outcomes.

What Each Type Tells You About the IRS’s Interest in the Case

The type of audit the IRS opens carries information about the agency’s view of the case. A correspondence audit signals that the IRS has identified a specific, narrow issue and believes it can be resolved through document production. An office audit signals that the IRS sees enough complexity to warrant in-person review but not enough to justify field resources. A field audit — particularly one conducted by LB&I or the Global High Wealth Group — signals that the IRS believes the case is worth investing significant resources in.

Conversely, the absence of certain audit types can also be informative. A taxpayer whose return contains issues that would normally warrant a field audit, but who receives only a correspondence audit, may be facing a case where the IRS does not yet appreciate the scope. That dynamic creates specific defensive considerations — and is one of the reasons experienced controversy counsel reads each audit’s type, scope, and selection signals carefully before deciding how to respond.

How Kugelman Law Handles Each Audit Type

Kugelman Law’s audit defense practice is calibrated to the type of audit and the complexity of the underlying issues. For correspondence audits with significant exposure or potential complexity, the firm provides focused review and response strategy. For office audits, the firm provides full pre-appointment preparation, representation at the examination, and follow-through. For field audits — particularly those conducted by LB&I or the Global High Wealth Group — the firm provides the sustained, methodology-driven defense that complex multi-year examinations require.

Founder Alex Kugelman brings nearly two decades of federal tax controversy experience, including litigation in U.S. Tax Court and U.S. District Court. Otto Bosch brings the inside-the-IRS perspective from his time as a Revenue Agent in the IRS Global High Wealth Group within LB&I — including direct experience with the examination types and divisional procedures that govern most substantive audits.

Representative outcomes from the firm’s audit defense practice include a $365,000 tax debt reduced to a zero-dollar liability, a multi-year audit and non-filing matter resolved with minimal payment, and ten years of unfiled returns brought into compliance with a successful outcome. Results depend on specific facts. Past results do not guarantee future outcomes.

Frequently Asked Questions

How do I know what type of IRS audit I am facing?

The initial IRS letter identifies the type of audit. A letter asking for documents to be mailed in is a correspondence audit. A letter scheduling an in-person appointment at an IRS office is an office audit. A letter from a Revenue Agent proposing to meet at your place of business or your representative’s office is a field audit. The letter will also identify the examiner’s title (tax examiner, Tax Compliance Officer, Revenue Agent) and the IRS division conducting the examination.

Is a correspondence audit less serious than a field audit?

Generally yes — but not always. Correspondence audits typically involve narrower issues and smaller dollar amounts, but they can produce significant adjustments and can escalate to broader examinations if the response surfaces complexity. The right approach is to take any IRS audit seriously regardless of type.

Can an office audit turn into a field audit?

Yes. Where the issues identified during an office audit prove more complex than expected, or where the scope expands to multiple years or related entities, the IRS can escalate the examination to a field audit. This is one of the reasons preparation for an office audit appointment matters — what surfaces at the appointment shapes whether the case stays narrow or expands.

Do I have to let an IRS Revenue Agent into my home or business?

You generally have the right to conduct an audit at your representative’s office rather than at your home or place of business, particularly when you are represented by an attorney, CPA, or EA. Revenue Agents typically accommodate reasonable location requests where the relevant records can be made available.

Who decides what type of audit will be conducted?

The IRS decides, based on the issues identified at selection, the complexity of the return, and the dollar amounts at stake. Taxpayers generally do not have the ability to elect one type over another, though the choice of representative and the location of the audit can be negotiated in field examinations.

Speak With Kugelman Law

If you have received an IRS audit notice of any type — correspondence, office, or field — schedule a paid privileged consultation with Kugelman Law. Call (415) 968-1780 or visit our contact page. All consultations are fully protected by attorney-client privilege.

About the Author

Alex Kugelman is the founder and managing attorney of Kugelman Law, a boutique tax controversy and cryptocurrency tax firm serving California and clients nationwide. With nearly two decades of federal tax controversy experience — including litigation in the U.S. Tax Court and U.S. District Court — Alex represents individuals and businesses in their most consequential disputes with the IRS and the California Franchise Tax Board. He is a member of the State Bar of California (No. 255463), admitted to the Bar of the U.S. Supreme Court, and served as San Francisco Chair of the Federal Bar Association’s Tax Division in 2018. He is also a member of the Marin County Assessment Appeals Board and a nationally recognized cryptocurrency tax attorney featured on the Bitcoin.tax podcast and The Mark Milton Show. Read Alex’s full bio.

The taxpayer, by contrast, often has incomplete records, CSV exports that do not reconcile cleanly, transactions spread across exchanges that no longer exist, and no clear sense of how to characterize half of the activity on the return.

That asymmetry is what makes crypto tax audit defense different from most other audit defense work. It is also why an inside-the-IRS perspective — knowing what the agent is actually looking at, how they have been trained to develop the case, and where their analytical framework is strongest and weakest — is so consequential to the outcome.

This article explains how Kugelman Law approaches crypto audit defense, with the perspective of attorney Otto Bosch, who served as a Revenue Agent in the IRS Global High Wealth Group within the Large Business and International (LB&I) Division before joining the firm in February 2026, paired with founder Alex Kugelman‘s nationally recognized cryptocurrency tax practice.

For background on what the IRS is doing in this space, see our companion article on inside an IRS cryptocurrency audit.

The Defensive Challenge in a Crypto Audit

Crypto audits combine several characteristics that, in combination, make them uniquely difficult to defend without specialized methodology:

• Volume. Active crypto traders, NFT participants, and DeFi users can have thousands or tens of thousands of transactions across dozens of exchanges and wallets over multi-year periods. The volume alone produces complexity that ordinary audit defense workflows are not designed to handle.
• Recordkeeping gaps. Exchanges shut down. Hot wallets get rolled into cold storage. CSV exports lose detail. Pre-2017 records are often nonexistent. The defense routinely operates with incomplete data that the IRS does not have either — but the burden of substantiation is on the taxpayer.
• Characterization ambiguity. Was that DeFi transaction a taxable event or not? Is the wrapping of a token a disposition? How is a liquidity pool exit characterized? Many crypto issues do not have clear IRS guidance, and the agent and the taxpayer can be looking at the same transactions and reaching different conclusions.
• The IRS’s data advantage. Through John Doe summons data, blockchain analytics partnerships, and broker reporting, the IRS sometimes knows about specific transactions the taxpayer does not remember.
• The Form 1040 digital asset question. A “no” answer on the digital asset question, paired with significant exchange activity, is a finding the agent will use throughout the case — for penalty positions, for willfulness analysis, and (in serious cases) for criminal referral consideration.

Each of these challenges has a defensive response. Together, they require methodology — not improvisation.

Phase One: Pre-Response Case Analysis

The first thing a former IRS agent does on a crypto audit is read the case before doing anything else. That means understanding what the IRS likely knows, what the IRS likely does not know, what the audit’s selection path tells the defense about the agent’s working hypothesis, and what the worst-case scenario looks like if the case develops adversely.

Specifically, the pre-response analysis includes:

• What does the IRS already have? If the audit was triggered by exchange data from a John Doe summons, the IRS has the data. If it was triggered by a Form 1040 digital asset question mismatch, the IRS knows what triggered it. If it was triggered by a related-return pickup, the IRS knows the connection. Reading the selection path is one of the first defensive moves.
• What is the taxpayer’s actual exposure? This requires reconstructing the full activity universe — every exchange, every wallet, every transaction type — and modeling the tax outcome before responding to the first Information Document Request.
• Are there parallel issues? Crypto activity often comes paired with foreign account issues (FBAR, Form 8938), unreported income from mining or staking, NFT royalty income, or other items that may not yet be on the agent’s radar but could become so.
• Is there potential for criminal exposure? Where the digital asset question was answered “no” while material activity existed, where amounts are significant, or where the pattern suggests willfulness, the audit may be — or may become — an eggshell audit. We covered the eggshell defense framework in detail in our article on eggshell audits explained.

The output of this phase is a defensive baseline: a clear picture of the case from both sides of the table before a single document is produced.

Phase Two: Reconstruction and Substantiation

Most crypto audits ultimately turn on reconstruction. The defense’s job is to produce a defensible record of activity, basis, and income — and to do so in a way that the agent’s blockchain analytics tools will validate rather than contradict.

Key elements of the reconstruction work:

• Exchange data consolidation. Pulling CSV exports, transaction histories, and tax reports from every exchange the taxpayer used, then reconciling across them to identify overlaps, gaps, and inconsistencies.
• Self-custody wallet tracing. Identifying every self-custody wallet, public address, and on-chain transaction. Where wallets are linked through transfers, the defense’s reconstruction has to match what blockchain analytics will show.
• Basis methodology selection. FIFO, LIFO, specific identification, average cost — the choice of basis methodology has real tax consequences and has to be applied consistently. Where prior years used one methodology and the audit year uses another, the inconsistency becomes a defense issue.
• Income item reconstruction. Mining rewards, staking rewards, airdrops, hard forks, and DeFi income items each have specific rules and require contemporaneous fair market value determinations.
• NFT-specific reconstruction. Mint cost, gas fees, royalty income, and marketplace fees — NFT activity requires its own analytical layer.
• Foreign exchange identification. Activity on offshore exchanges triggers FBAR and Form 8938 considerations that must be developed in parallel with the income tax analysis.

The objective of the reconstruction is not to produce a document that satisfies the agent. The objective is to produce a record that withstands the agent’s verification, the appeals officer’s later review, and (if necessary) the U.S. Tax Court’s examination of the workpapers.

Phase Three: Document Strategy and IDR Response

Once the case has been read and the reconstruction is in hand, the defense engages with the IRS’s Information Document Requests. As we covered in detail in our article on how to respond to an IRS IDR, IDR responses are not paperwork exercises — they are deliberate, strategic communications that frame the audit’s record.

In crypto audits, the IDR response strategy involves several specific considerations:

• Scope clarification on broad requests. The opening IDR in a crypto audit is often written broadly. “All cryptocurrency transactions for tax years 20XX through 20XX” is the kind of request that can almost always be narrowed through respectful negotiation.
• Producing reconstructions rather than raw data. Where appropriate, providing the agent with a clean, reconciled summary of activity — with the underlying data available on request — produces a better record than dumping raw CSV files the agent has to interpret.
• Privilege review of advisor communications. Communications with tax preparers, accountants, and prior counsel about crypto positions may be privileged and should be reviewed before production.
• The disclosure analysis. Information about wallets or exchanges the IRS does not appear to know about is the single most consequential disclosure decision in any crypto audit. That decision should never be made without legal analysis.
• Reconciling with what the IRS likely already has. Where the defense’s reconstruction differs from what the IRS will see in its own data, those gaps need to be explained — not ignored.

Phase Four: Engaging With the Agent’s Blockchain Analytics

One of the more sophisticated aspects of crypto audit defense is engaging substantively with the blockchain analytics the IRS uses. Agents in crypto examinations are often working with output from tools like Chainalysis, and the analytics produces conclusions the defense will eventually need to address.

The defense’s role here includes:

• Understanding what the analytics actually shows and what it does not. Analytics tools attribute wallets to identified taxpayers with varying degrees of confidence. Some attributions are airtight. Others rest on inference. Knowing which is which matters.
• Identifying analytic errors. Misattributed wallets, transactions that the analytics counts twice, transfers between the taxpayer’s own wallets that should not be treated as dispositions — these are common analytic errors that can move large numbers.
• Producing counter-reconstructions. Where the defense’s reconstruction differs from the IRS’s analytics output, the difference needs to be explained with documentation.

Inside-the-IRS experience matters here. Agents have specific training on how to use these tools, and counsel who has been inside the IRS recognizes both the tools’ strengths and their characteristic failure modes.

Phase Five: Negotiating Crypto-Specific Positions

Crypto audits frequently involve issues where the law is unsettled, where IRS guidance is ambiguous, or where the agent’s position is technically defensible but practically negotiable. The defense’s job is to identify these positions early and to negotiate them on terms favorable to the taxpayer.

Common negotiation points in crypto audits include:

• Basis methodology disputes. Where the agent is treating undocumented basis as zero, the defense may be able to negotiate a reasonable basis position with appropriate substantiation.
• Characterization questions. Whether a particular transaction is a taxable disposition, a like-kind exchange (for pre-2018 trades), a borrowing rather than a sale, or something else — these characterization questions are often negotiable.
• Penalty mitigation. Accuracy-related penalties under Section 6662 are not automatic. Reasonable cause defenses, reliance on tax software output, reliance on professional advice, and other mitigating facts can reduce or eliminate penalty exposure.
• Willfulness defenses. Where FBAR issues are in play, the willfulness analysis drives penalty exposure significantly. A defensible non-willful posture can move outcomes by orders of magnitude.

Phase Six: The Escalation Path

Most crypto audits should be resolved at the examination level when possible. But the defense’s posture should always be calibrated to the possibility that the case escalates — to Appeals, to U.S. Tax Court, or, in the most serious matters, to a voluntary disclosure pathway.

The escalation analysis includes:

• Settlement leverage. What is the realistic best and worst case at the agent level versus at Appeals? Where Appeals would likely produce a better outcome, the defense’s posture at the examination level shifts.
• Litigation readiness. If the case proceeds to U.S. Tax Court, the record built during the examination is what the case is decided on. The defense’s IDR responses, written communications, and document production should be calibrated accordingly from day one.
• Voluntary disclosure as a parallel option. For the most serious cases involving significant unreported activity, false answers to the digital asset question, or undisclosed offshore exchange use, the IRS Voluntary Disclosure Practice may be the strategically correct path. The decision to pursue VDP is consequential and time-sensitive — generally available only before IRS discovery.

For foreign-exchange-related issues, streamlined offshore procedures, delinquent FBAR procedures, and delinquent foreign information return procedures provide alternative pathways depending on willfulness.

How Kugelman Law’s Combined Capability Shapes the Defense

Kugelman Law is structured deliberately for crypto controversy work. Alex Kugelman has been featured nationally on the Bitcoin.tax podcast and The Mark Milton Show discussing IRS digital asset enforcement, and has built one of the country’s earliest dedicated cryptocurrency tax practices through the firm’s cryptocurrency accounting and audits service. Otto Bosch brings the inside-the-IRS perspective from his time as a Revenue Agent in the LB&I Global High Wealth Group.

The combination is the point. Crypto fluency without IRS-insider perspective leaves the defense reading blind on the agent’s posture and the IRS’s internal calculus. IRS-insider perspective without crypto fluency leaves the defense unable to engage the technical issues that drive the case. Both are necessary. Few firms in the country offer both under one roof. For an extended discussion of how that combined capability shapes audit defense, see our article on why a former IRS revenue agent attorney changes audit defense.

Representative outcomes from the firm’s controversy practice include a $365,000 tax debt reduced to a zero-dollar liability, a multi-year audit and non-filing matter resolved with minimal payment, and ten years of unfiled returns brought into compliance with a successful outcome. Results depend on specific facts. Past results do not guarantee future outcomes.

Frequently Asked Questions

What makes a crypto tax audit different from a regular tax audit?

Crypto tax audits involve transaction volumes, recordkeeping gaps, characterization ambiguities, and an asymmetric data environment that are uncommon in other types of audits. The IRS has built specific enforcement infrastructure for digital asset cases — including blockchain analytics, John Doe summons data, and dedicated training — and the defense methodology has to be calibrated accordingly.

Can I defend a crypto audit using my regular accountant?

For straightforward documentation-focused crypto matters, sometimes. For substantive crypto audits — particularly those involving significant amounts, multi-year activity, foreign exchange use, or any potential criminal exposure — attorney representation with crypto-specific experience is generally appropriate. The privilege protection, technical specialization, and litigation backstop matter in this space.

What is the most common issue in a crypto audit?

Unreported dispositions and undocumented basis are the two largest single issues in most crypto audits. Mining, staking, airdrop, and hard fork income items are also routinely under-reported. NFT-specific issues, DeFi characterization questions, and foreign exchange use round out the most common categories.

How does the IRS know about my crypto wallets?

The IRS has access to exchange data produced through John Doe summonses (Coinbase, Kraken, Circle, and others), expanded broker reporting under digital asset rules, blockchain analytics tools that trace transactions across wallet addresses, intergovernmental information exchange agreements for foreign-domiciled exchanges, and a growing array of other data sources. Self-custody wallets are not invisible to the IRS, and the assumption that they are has produced significant exposure for taxpayers who relied on it.

Should I amend my returns before the IRS opens an audit?

Sometimes — but the answer depends heavily on the facts. Amending returns can be the right approach in some cases and exactly the wrong approach in others, particularly where there is potential criminal exposure or where the taxpayer is already under examination. The decision should be made with experienced controversy counsel, not unilaterally.

Speak With Kugelman Law

If you are facing an IRS cryptocurrency audit, have received an IRS notice involving digital assets, or are weighing how to resolve crypto tax compliance issues before they reach an examination, schedule a paid privileged consultation with Kugelman Law. Call (415) 968-1780 or visit our contact page. All consultations are fully protected by attorney-client privilege.

About the Author

Alex Kugelman is the founder and managing attorney of Kugelman Law, a boutique tax controversy and cryptocurrency tax firm serving California and clients nationwide. With nearly two decades of federal tax controversy experience — including litigation in the U.S. Tax Court and U.S. District Court — Alex represents individuals and businesses in their most consequential disputes with the IRS and the California Franchise Tax Board. He is a member of the State Bar of California (No. 255463), admitted to the Bar of the U.S. Supreme Court, and served as San Francisco Chair of the Federal Bar Association’s Tax Division in 2018. He is also a member of the Marin County Assessment Appeals Board and a nationally recognized cryptocurrency tax attorney featured on the Bitcoin.tax podcast and The Mark Milton Show. Read Alex’s full bio.

Some audits are something else entirely.

An eggshell audit is a civil IRS examination that has, or could have, criminal implications. The label captures the central problem: every step the taxpayer or their representative takes during the audit is taken on ground that could crack, transforming a civil dispute into a criminal investigation.

Statements made to the agent can become evidence. Documents produced can become exhibits. A misjudgment on the wrong issue can mean the difference between a tax assessment and a federal prosecution.

This article explains what an eggshell audit is, why it requires a fundamentally different defense posture than a routine examination, and what taxpayers should understand if they have any reason to believe their audit may be or may become one.

The perspective is informed by Kugelman Law attorney Otto Bosch, who served as a Revenue Agent in the IRS Global High Wealth Group within the Large Business and International (LB&I) Division before joining the firm in February 2026, paired with founder Alex Kugelman‘s nearly two decades of federal tax controversy experience including U.S. Tax Court and U.S. District Court litigation.

Important note: This article is general legal information, not legal advice. If you have reason to believe your audit may involve criminal exposure, you should retain an experienced tax controversy attorney before making any further communication with the IRS.

What Is an Eggshell Audit?

An eggshell audit is the term tax controversy practitioners use to describe a civil IRS examination in which the taxpayer (or their representative, or both) has reason to believe that material elements of the return — or the underlying facts — could expose the taxpayer to civil fraud penalties or criminal prosecution if the IRS develops them.

The “eggshell” metaphor is apt. The audit appears civil, the Revenue Agent is operating under civil procedures, and the surface posture is administrative. But the situation is fragile in a way the agent may not yet appreciate, and a wrong step by the taxpayer — particularly a false statement, a misleading explanation, or an inadvertent disclosure — can crack open exposure that was previously contained.

Eggshell audits are not rare in absolute terms, but they are uncommon as a percentage of all audits. They tend to arise from specific underlying fact patterns: significant unreported income, undisclosed foreign accounts, cryptocurrency activity inconsistent with reported income, falsified records, or statements to the IRS that cannot be reconciled with the underlying facts. In each case, the civil examination is the proximate event, but the criminal exposure is the deeper concern.

Eggshell vs. Reverse-Eggshell Audits

Practitioners distinguish two related but different scenarios:

Eggshell audit. A civil IRS examination in which the taxpayer (and counsel) know about potential criminal exposure, but the civil Revenue Agent does not. The defense’s strategic concern is to avoid taking steps during the civil audit that would educate the agent about the criminal facts.

Reverse-eggshell audit. A civil examination in which the Revenue Agent has signals or actual knowledge of potential criminal exposure but continues operating under civil procedures. This scenario is more dangerous because the agent’s questions, document requests, and approach are likely calibrated to develop the criminal evidence while preserving the civil posture. Recognizing a reverse-eggshell audit early is one of the most important things a defense team can do.

The defense strategy in each scenario is different, and both require the kind of inside-the-IRS perspective that allows counsel to read the agent’s posture accurately.

How Eggshell Audits Typically Arise

The fact patterns that produce eggshell audits cluster around specific issue categories:

• Significant unreported income. Bank deposits that exceed reported gross income by margins that cannot be explained by transfers, gifts, or loans. Side businesses that were not reported. Cash receipts that were not deposited. Income from sources the taxpayer hoped the IRS would not discover.
• Undisclosed foreign accounts. Failure to file FBAR (FinCEN Form 114) or Form 8938 over multiple years, particularly where the account balances are substantial and the failure appears willful rather than inadvertent.
• Cryptocurrency activity inconsistent with reported income. A “no” answer to the Form 1040 digital asset question paired with significant exchange activity now visible to the IRS through John Doe summons data, blockchain analytics, or expanded broker reporting. See our article on inside an IRS cryptocurrency audit for the broader enforcement context.
• Falsified records or fabricated deductions. Invoices for expenses that did not occur. Mileage logs created after the fact for trips that did not happen. Charitable contributions claimed for property never donated. Substantiation that does not survive even cursory scrutiny.
• False statements to the IRS. Statements made to a Revenue Agent during an interview that are inconsistent with the documents, with the return, or with the underlying facts.
• Patterns of conduct suggesting a course of evasion. Where multiple years show consistent patterns of underreporting or non-filing rather than isolated errors, the case takes on a different character.

The presence of one of these fact patterns does not necessarily mean an audit is — or will become — an eggshell audit. Most are addressed through civil resolution. But the presence of any of them changes the risk profile of the examination.

Why Eggshell Audits Are So Dangerous

Three structural features of the U.S. tax system make eggshell audits uniquely dangerous compared to other tax matters.

Civil statements and documents become criminal evidence. Anything the taxpayer says to a Revenue Agent — and anything the taxpayer produces in response to an IDR — can be used in a subsequent criminal prosecution. There is no separation between the civil and criminal records. A false statement during a civil audit becomes obstruction-adjacent in a criminal case.

The statute of limitations is unlimited for fraud. The standard three-year statute of limitations on assessment, and the six-year statute for substantial omissions, do not apply to fraudulent returns. A civil examination that develops fraud allegations can reach back many years — and a criminal investigation that develops a willful evasion charge faces no time limit at all in some scenarios.

Penalties are catastrophic. Civil fraud carries a 75 percent penalty on the underpayment. Criminal tax evasion under Section 7201 is a felony with potential imprisonment of up to five years and substantial fines, in addition to the underlying tax, interest, and civil fraud penalty. Willful failure to file under Section 7203 is a misdemeanor. Filing a false return under Section 7206 is a felony. The penalty stacking on a serious case can exceed the original tax exposure by many multiples.

Signs Your Audit May Be (or May Become) an Eggshell Audit

Recognizing the signs of an audit that has shifted — or is shifting — toward a criminal posture is one of the most consequential defensive skills in controversy practice. Indicators include:

• Agent questions that focus on knowledge, intent, and willfulness. “When did you become aware of…?” “Why didn’t you report…?” “Who advised you about…?” These are not documentation questions. They are intent-development questions.
• Specific document requests focused on the fraud elements. Requests for items that would not be relevant in a routine civil audit — communications with advisors about the disputed positions, records of when transactions were undertaken, drafts of returns before final filing.
• Specialist involvement. Appearance of fraud technical advisors, fraud enforcement advisors, or IRS Criminal Investigation (IRS-CI) personnel — even informally — is a significant signal.
• Sudden agent silence. A Revenue Agent who was actively engaged on a case and then becomes unresponsive, particularly after a significant disclosure, may have made a referral.
• Patterns of questioning that anticipate prosecutorial elements. Questions structured around the elements of tax evasion (additional tax due, willfulness, affirmative act of evasion) rather than around the elements of a civil adjustment.
• Reluctance to discuss the case substantively. Agents in reverse-eggshell scenarios are often trained to maintain a civil posture without committing to civil resolution.

None of these signals is dispositive on its own. The combination, and the pattern over time, is what matters. Counsel who has worked inside the IRS recognizes these signals more reliably than counsel who has only worked across the table.

Common Mistakes in Eggshell Audits

The most consequential errors in eggshell audits tend to cluster around the same patterns:

• Sitting for an unrepresented interview. Statements made in an interview to a Revenue Agent become part of the permanent record. Statements made to a special agent become potential exhibits in a criminal prosecution. Interviews without counsel are nearly always a mistake in any case with potential criminal exposure.
• Producing documents without privilege review. Documents responsive to an IDR may include attorney communications, advisor analyses, or work product that should be withheld under privilege. Production without review waives protections that cannot be recovered.
• Volunteering explanations to “look cooperative.” Cooperation is a virtue in routine civil audits. In eggshell audits, every explanation that touches on knowledge, intent, or motive creates risk. The difference between productive cooperation and self-incriminating explanation is exactly the kind of judgment experienced controversy counsel provides.
• Making false or misleading statements to the agent. False statements to a federal officer are a separate criminal offense under 18 U.S.C. Section 1001, independent of any underlying tax crime. Once made, they are difficult to unmake.
• Attempting to “explain away” prior misstatements. Doubling down on a prior false statement compounds the exposure rather than mitigating it.
• Choosing the wrong professional. As we discussed in our article on tax attorney versus CPA for IRS audit defense, CPA representation does not provide attorney-client privilege protection. In matters with potential criminal exposure, attorney representation is not a preference. It is the only structurally appropriate choice.

How an Eggshell Audit Defense Is Different

Defending an eggshell audit is fundamentally different from defending a routine examination. Several principles structure the defense:

Privilege is the foundation. Every communication about the case must be handled within the attorney-client privilege framework, and work product must be developed and maintained accordingly. Where accountants need to be involved (for technical reconstruction, return preparation, or financial analysis), they should typically be engaged through a Kovel arrangement that brings them within the attorney’s privilege.

Communications run through counsel only. Taxpayers do not communicate directly with the agent. Counsel manages all written and verbal communication, with the taxpayer’s role limited to providing facts to counsel within the privilege.

Document production is reviewed before delivery. Every document responsive to an IDR is reviewed for privilege, for content that would educate the agent about criminal facts, and for context that may need to be addressed. Production is deliberate, not reflexive. See our article on how to respond to an IRS IDR for the underlying framework.

Fifth Amendment considerations are evaluated case-by-case. In matters with sufficient criminal exposure, the Fifth Amendment privilege against self-incrimination may apply to particular questions, particular documents, or in some cases the entire examination. The decision to invoke the Fifth Amendment is significant — it can signal criminal exposure to the agent — but in some cases it is the appropriate protection.

Voluntary disclosure is evaluated as a strategic option. Where the facts warrant, the IRS Voluntary Disclosure Practice (VDP) can be a path to resolving criminal exposure on relatively defined terms — but it is only available before the IRS has discovered the noncompliance, and the criteria are specific.

Voluntary Disclosure as a Strategic Tool

The IRS Voluntary Disclosure Practice is the formal pathway through which taxpayers can come forward and disclose past noncompliance in exchange for the IRS’s commitment not to recommend criminal prosecution (subject to specific conditions and case-by-case determination).

Key features of the practice:

• The disclosure must be timely — generally made before the IRS has notified the taxpayer of a civil examination or criminal investigation, and before the IRS has otherwise received information from a third party about the noncompliance.
• The disclosure must be truthful, complete, and cooperative.
• The taxpayer must be prepared to pay the tax, interest, and applicable penalties.
• The disclosure does not provide absolute immunity from prosecution — it is a recommendation against prosecution, not a guarantee.

VDP is not the right path in every eggshell scenario. For matters involving foreign accounts where willfulness can be defended as non-willful, streamlined offshore procedures may produce a better outcome with substantially reduced penalties. For matters where the IRS has already opened an examination, VDP may not be available at all. The choice among voluntary disclosure pathways is one of the most consequential decisions in eggshell defense and requires careful legal analysis of the specific facts.

For taxpayers considering offshore disclosure, our service pages on streamlined offshore procedures, delinquent FBAR procedures, and delinquent foreign information return procedures provide additional context on the relevant pathways.

How Kugelman Law Handles Eggshell Audits

Kugelman Law approaches every audit defense matter with attention to the criminal dimensions that may be present even when the surface posture is civil. The firm’s combination of capabilities — Otto Bosch’s inside-the-IRS background as a former Revenue Agent in the Global High Wealth Group, and Alex Kugelman’s nearly two decades of federal tax controversy and litigation experience — is calibrated specifically for the kinds of cases where reading the IRS’s posture correctly is the difference between a manageable matter and a catastrophic one.

The firm’s audit defense practice is structured around the principle that the early stages of an examination are the most consequential. Decisions made in responding to the first IDR, in handling the opening conference, in giving or not giving interviews, and in producing or not producing documents shape the case in ways that cannot be undone later. Where the case has potential eggshell characteristics, that principle becomes paramount.

Representative outcomes from the firm’s controversy practice include a $365,000 tax debt reduced to a zero-dollar liability, a multi-year audit and non-filing matter resolved with minimal payment, and ten years of unfiled returns brought into compliance with a successful outcome. Results depend on specific facts. Past results do not guarantee future outcomes.

Frequently Asked Questions

What is the difference between an audit and a criminal investigation?

A civil audit is conducted by Revenue Agents under civil procedures to develop and assess tax adjustments. A criminal tax investigation is conducted by Special Agents within IRS Criminal Investigation (IRS-CI) under criminal procedures to develop evidence for potential prosecution. The two processes can overlap — particularly in reverse-eggshell scenarios — but they are governed by different rules and present different risks.

Should I tell the Revenue Agent about other issues they haven’t asked about?

Almost never. Volunteering information not requested in an IDR is one of the most common and most expensive mistakes in any audit, and the consequences are particularly severe where the volunteered information has criminal implications. Decisions about disclosure should be made with experienced controversy counsel.

Can I be prosecuted for an honest mistake on my tax return?

Honest mistakes — including significant ones — are generally not criminal. Criminal tax violations require willfulness: a voluntary, intentional violation of a known legal duty. Negligent or careless errors, even when they result in substantial underpayment, are typically civil matters. The line between negligence and willfulness is fact-intensive and is one of the central battlegrounds in eggshell defense.

What is the IRS Voluntary Disclosure Practice?

The IRS Voluntary Disclosure Practice (VDP) is a formal program through which taxpayers can disclose past noncompliance in exchange for the IRS’s recommendation against criminal prosecution. The disclosure must be timely (before IRS discovery), truthful, complete, and cooperative, and the taxpayer must pay the tax, interest, and applicable penalties. VDP is one of several voluntary disclosure pathways, and the choice among them is consequential and fact-specific.

Do I need a different attorney for an eggshell audit than for a routine audit?

The attorney for a serious audit and the attorney for an eggshell audit should have the same core skills: federal tax controversy experience, attorney-client privilege protection, and the ability to litigate if necessary. What changes in eggshell scenarios is the standard of care — every decision is weighted by the criminal implications, and the margin for error is narrow. Attorneys with significant eggshell experience are typically better positioned to defend these matters.

Speak With Kugelman Law

If you have reason to believe your IRS audit may involve criminal implications — or if you are weighing whether voluntary disclosure is appropriate for past noncompliance — schedule a paid privileged consultation with Kugelman Law. Call (415) 968-1780 or visit our contact page. All consultations are fully protected by attorney-client privilege.

About the Author

Alex Kugelman is the founder and managing attorney of Kugelman Law, a boutique tax controversy and cryptocurrency tax firm serving California and clients nationwide. With nearly two decades of federal tax controversy experience — including litigation in the U.S. Tax Court and U.S. District Court — Alex represents individuals and businesses in their most consequential disputes with the IRS and the California Franchise Tax Board. He is a member of the State Bar of California (No. 255463), admitted to the Bar of the U.S. Supreme Court, and served as San Francisco Chair of the Federal Bar Association’s Tax Division in 2018. He is also a member of the Marin County Assessment Appeals Board and a nationally recognized cryptocurrency tax attorney featured on the Bitcoin.tax podcast and The Mark Milton Show. Read Alex’s full bio.

For taxpayers who have just received an IDR, the temptation is to treat it as a routine paperwork exercise: gather the documents the form asks for, attach them in a folder, and send them in.

That is exactly the approach experienced Revenue Agents are trained to capitalize on. A response built around what was literally asked, without strategic consideration of what should and should not be produced, frames the rest of the audit on the IRS’s terms.

This article walks through how to respond to an IRS IDR from the inside, with the insider perspective of Kugelman Law attorney Otto Bosch, who served as a Revenue Agent in the IRS Global High Wealth Group within the Large Business and International (LB&I) Division before joining the firm in February 2026.

For background on how Revenue Agents think and operate more broadly, see our companion pieces on what an IRS Revenue Agent does and inside the IRS audit playbook.

What an IRS Information Document Request (IDR) Actually Is

The IDR is a formal document — typically issued on Form 4564 — that the IRS uses during an examination to request specific records and information from a taxpayer. It is not a discovery request in the legal sense, and it is not an interview. It is a written demand for documents and information that the agent will use to develop the case.

Several characteristics distinguish the IDR from other IRS correspondence:

• It is case-specific — directed at a particular taxpayer in connection with a particular examination, not a generic compliance notice.
• It is iterative — almost every audit involves multiple IDRs, with each one shaped by the responses to those that came before.
• It typically includes a deadline by which the response is expected, though deadlines are often negotiable.
• The response forms part of the administrative record that follows the case through any subsequent appeal or litigation.

The IDR is not a subpoena. The IRS cannot compel a response to an IDR in the same way it can compel a response to an administrative summons. However, ignoring or stonewalling an IDR has consequences — including the IRS’s ability to issue a summons, expand the audit, or assess based on the information the IRS already has (which is often unfavorable to the taxpayer).

Why the First IDR Is the Most Consequential Document in Your Audit

From the agent’s perspective, the first IDR is the tool for confirming or refuting the working hypothesis they formed during pre-contact review. From the taxpayer’s perspective, it is the moment when the audit’s scope, tone, and trajectory are set.

Three reasons the first IDR carries outsized weight:

It defines the initial scope of the examination. The issues the agent asks about in the first IDR are the issues the agent expects to develop. The documents produced (and not produced) become the factual record against which adjustments will be measured.

It frames every subsequent IDR. Each IDR after the first is shaped by what the prior response did and did not contain. The agent is not asking the same questions again — they are using each response to refine the next request and develop deeper issues.

It signals to the agent how sophisticated the taxpayer is. A well-organized, complete, and strategically scoped response signals a represented taxpayer who understands the process. A disorganized or over-broad response signals a taxpayer who is likely to make further mistakes as the audit deepens. Both signals affect how aggressively the agent invests in the case.

How a Revenue Agent Reads Your IDR Response

When an experienced Revenue Agent receives an IDR response, they are looking for far more than the literal documents requested. They are reading the response for signals about the case, the taxpayer, and the recordkeeping behind the return.

Specifically, agents are trained to evaluate:

• What was produced. Are the documents responsive to the request? Are they complete? Are they originals or photocopies? Are they organized?
• What was conspicuously absent. Documents the agent expected to see but did not. Categories of records that should exist but were not produced.
• What the production reveals about the taxpayer’s recordkeeping. Contemporaneous records signal a sophisticated taxpayer with strong defensive positions. Reconstructed records — easily identified by tone, format, and consistency — signal the opposite.
• What was volunteered. Documents and information produced that were not requested. These are often more revealing than the requested production.

The response, in other words, is a document the agent reads with the same care a litigator reads a deposition transcript. Treating it casually is a mistake that compounds throughout the audit.

Six Strategic Considerations Before You Respond

A well-handled IDR response is the product of deliberate analysis, not document collection. The strategic considerations below are the kinds of judgments that experienced controversy counsel apply to every IDR they handle.

1. Scope review — what was actually asked

The first task is to read the IDR carefully and identify exactly what the agent is requesting. IDRs are often written broadly, and broad requests can be narrowed through respectful clarification. A request for “all documents related to your business” is not the same as a request for “general ledgers, bank statements, and invoices for tax year 2024.” Where the request is broader than the agent likely intends, a clarifying conversation can produce a more targeted scope.

2. Document gathering — what exists versus what would need to be reconstructed

The next task is to identify which responsive documents exist contemporaneously and which would need to be created, reconstructed, or summarized. Contemporaneous documents are far stronger evidentially than anything created during the audit. Where contemporaneous documents do not exist, the question becomes whether reconstruction is appropriate and how to present it honestly. This judgment matters because, as covered in our article on what IRS auditors look for, agents are trained to recognize reconstruction.

3. Privilege review — what should be withheld

Some categories of documents may be protected by attorney-client privilege, attorney work product, or the limited federally authorized tax practitioner privilege under Section 7525. Privileged documents should be withheld, with a privilege log identifying the categories withheld. This requires legal analysis. We discuss the privilege landscape in detail in our article on tax attorney versus CPA for IRS audit defense.

4. Disclosure analysis — what not to volunteer

Producing more than was asked for is almost never a good idea. It creates work for the agent, raises new issues the agent had not yet developed, and signals to the agent that the taxpayer is unrepresented or insufficiently represented. Documents not responsive to the IDR should not be produced.

5. Format and delivery — building a clean paper trail

How documents are produced matters. Numbered exhibits with a transmittal letter, a clear index, and Bates-stamped pages produce a record that is easy to defend later. Loose documents in a folder produce a record that is hard to defend later.

6. Timing — deadlines and extensions

IDR deadlines are deadlines, but they are also negotiable in most circumstances. A request for an extension, made in good faith and accompanied by a substantive update on the response status, is routinely granted. Missing a deadline without communication signals problems and invites the agent to expand the audit. Communication is the right default.

Common Mistakes Taxpayers Make on IDR Responses

The pattern of mistakes on IDR responses is consistent enough that experienced controversy counsel recognize the signs from the first conversation. The most common errors:

• Over-producing. Sending the agent everything in the file, on the theory that more cooperation is better cooperation. In practice, this expands the audit’s scope and surfaces issues the agent had not yet identified.
• Improvising during follow-up calls. After producing documents, the taxpayer takes a call from the agent and answers questions on the fly. Statements made during these calls become part of the record and can contradict the documents.
• Reconstructing records that look reconstructed. Mileage logs typed up after the audit notice. Expense substantiation created with consistent formatting and identical handwriting. Agents are trained to identify these and discount them accordingly.
• Missing deadlines without extension requests. Letting a deadline pass signals lack of representation and lack of organization. It also invites the agent to assume the worst about the missing documents.
• Volunteering documents and explanations not requested. Often the most expensive single mistake. Documents not asked for that contain unfavorable information will be developed; documents not asked for that contain favorable information are usually less useful than the taxpayer expects.
• Letting an unrepresented preparer handle the response. Return preparers often have the right documents but not the strategic perspective on how to produce them. Many of the worst IDR responses come from competent preparers operating in good faith without controversy experience.

When You Need an Attorney for the IDR Response

Not every IDR requires attorney involvement. A correspondence audit asking for a missing 1099 can generally be handled by the preparer or even directly by the taxpayer. But the moment any of the following becomes true, attorney representation should be retained before the response is sent:

• The dollar amounts in dispute are significant
• The technical issues are complex — partnership, S-corporation, basis, related-party
• Foreign accounts or cryptocurrency are involved
• The taxpayer has any reason to suspect criminal exposure (eggshell audit)
• The audit is being conducted by LB&I, the Global High Wealth Group, or another specialized examination unit
• The IRS has indicated it may pursue aggressive penalties, including civil fraud

Attorneys also have a tool that CPAs and EAs do not: attorney-client privilege over the strategic analysis behind the response. The privilege protection alone is worth attorney involvement in any case with potential criminal implications.

What Happens After You Respond — The Second IDR

For most substantive examinations, the second IDR is where the audit’s actual depth becomes visible. The first IDR was the agent’s tool for confirming the pre-contact hypothesis. The second IDR is where the agent develops the specific issues that the first IDR’s response either raised or failed to put to rest.

Several things can be read from the second IDR:

• Narrower scope. If the second IDR focuses on a specific issue, the agent has probably set the rest of the case aside.
• Broader scope. If the second IDR expands beyond the original areas, the agent’s hypothesis has shifted — usually because something in the first response opened new issues.
• Pivot to legal questions. If the second IDR starts asking about the taxpayer’s knowledge, intent, or interpretation of legal positions, the audit is moving from documentation to characterization — and potentially toward an eggshell posture.
• Specialist involvement. Requests for information that look outside the original agent’s expertise suggest a specialist has been brought in.

Recognizing these signals reliably requires controversy experience.

How Kugelman Law Handles IDR Responses

Kugelman Law approaches every IDR response with two parallel perspectives. Otto Bosch’s background as a former Revenue Agent in the IRS Global High Wealth Group provides the insider’s view on how the agent will read the response. Alex Kugelman‘s nearly two decades of federal tax controversy experience — including U.S. Tax Court and U.S. District Court litigation — provides the strategic perspective on how the record being built today will perform if the case goes to Appeals or trial.

The result is an IDR response process that is calibrated not only to the immediate examination but to the full possible escalation path. Documents are produced in a format that defends the case at every subsequent stage. Privilege is asserted where appropriate and documented through a clean privilege log. Disclosures are deliberate. Communications are written in language that holds up under later review. And the second IDR — when it arrives — meets a defense that is already prepared for it.

For more on how Kugelman Law’s combination of capabilities shapes audit defense, see our article on why a former IRS revenue agent attorney changes audit defense. Representative outcomes from the firm’s audit defense practice include a $365,000 tax debt reduced to a zero-dollar liability, a multi-year audit and non-filing matter resolved with minimal payment, and ten years of unfiled returns brought into compliance with a successful outcome. Results depend on specific facts. Past results do not guarantee future outcomes.

Frequently Asked Questions

What is Form 4564?

Form 4564 is the IRS form used to issue an Information Document Request during an examination. It identifies the documents and information the Revenue Agent is requesting, the deadline for response, and the agent’s contact information. Most IDRs are issued on Form 4564.

Do I have to respond to an IRS IDR?

The IDR itself is not legally enforceable in the way an administrative summons is, but failing to respond has practical consequences — including expanded examination scope, IRS summons authority, and assessments based on the unfavorable information the IRS already has. In nearly all circumstances, responding to the IDR (or negotiating its scope) is the right approach.

How long do I have to respond to an IRS IDR?

IDRs typically include a deadline of two to four weeks, but deadlines are negotiable in most circumstances. A request for an extension made in good faith, with a substantive update on the status of the response, is routinely granted. Communication with the agent about timing is almost always preferable to silence.

What if I cannot produce all the documents the IDR requests?

Missing documents are common in audits and are not necessarily fatal to the defense. The response should clearly identify what is being produced, what is unavailable and why, and what is being reconstructed. Where reconstruction is appropriate, it should be done honestly and clearly labeled as reconstruction. Hiding gaps is far more damaging than identifying them.

Should my CPA respond to the IDR?

Often a CPA can prepare the documents that go into an IDR response, but the strategic decisions about scope, privilege, disclosure, and presentation are legal decisions. For substantive examinations, the right structure is generally attorney-led representation with CPA support — sometimes through a Kovel arrangement that brings the CPA within the attorney’s privilege.

Speak With Kugelman Law

If you have received an IRS Information Document Request — or are anticipating one — schedule a paid privileged consultation with Kugelman Law. Call (415) 968-1780 or visit our contact page. All consultations are fully protected by attorney-client privilege.

About the Author

Alex Kugelman is the founder and managing attorney of Kugelman Law, a boutique tax controversy and cryptocurrency tax firm serving California and clients nationwide. With nearly two decades of federal tax controversy experience — including litigation in the U.S. Tax Court and U.S. District Court — Alex represents individuals and businesses in their most consequential disputes with the IRS and the California Franchise Tax Board. He is a member of the State Bar of California (No. 255463), admitted to the Bar of the U.S. Supreme Court, and served as San Francisco Chair of the Federal Bar Association’s Tax Division in 2018. He is also a member of the Marin County Assessment Appeals Board and a nationally recognized cryptocurrency tax attorney featured on the Bitcoin.tax podcast and The Mark Milton Show. Read Alex’s full bio.

When an IRS Revenue Agent opens an examination, they are not approaching your return with an open mind looking for whatever happens to come up. They are approaching it with a defined set of issue categories they have been trained to develop, supported by analytical techniques the IRS teaches in formal examination training. Knowing what IRS auditors look for — and the specific techniques agents use to develop each issue — is the difference between a defense that anticipates the audit and a defense that scrambles to react to it.

This article walks through the five issue categories that drive the majority of substantive IRS examinations, with the insider perspective of Kugelman Law attorney Otto Bosch, who served as a Revenue Agent in the IRS Global High Wealth Group within the Large Business and International (LB&I) Division before joining the firm. For broader background on how Revenue Agents think and operate, see our companion articles on what an IRS Revenue Agent does and inside the IRS audit playbook.

1. Unreported Income

Unreported income is the single largest category of examination adjustments year after year, and it is the issue Revenue Agents are most rigorously trained to develop. The reason is simple — every dollar of unreported income flows directly through to additional tax, accuracy-related penalties, and (in serious cases) civil fraud penalties or criminal referral. The dollar leverage on this category is the highest of any audit issue.

Agents are trained to use multiple analytical techniques to identify unreported income:

• Third-party matching. W-2s, 1099s, K-1s, broker statements, gambling winnings, foreign account disclosures, cryptocurrency exchange reports, and a growing array of other information returns are matched against filed returns. Mismatches generate examinations.
• Bank deposit analysis. Total bank deposits across all accounts (personal and business) are compared to reported gross income. Significant gaps that cannot be explained by transfers, loans, gifts, or other non-taxable sources become potential unreported income.
• Net worth analysis. Increases in the taxpayer’s net worth across years, plus personal living expenses, are compared to reported income. The basic equation: if a taxpayer accumulated $300,000 in net worth in a year while reporting $100,000 in income and spending $80,000 on living expenses, the math does not work — and the agent will pursue the gap.
• Specific item examination. The agent identifies a specific potential income source — a side business, a property sale, a partnership distribution, gambling activity — and traces it to determine whether it was correctly reported.
• Lifestyle indicators. Significant gaps between what the return shows and what the taxpayer’s life suggests — homes, cars, travel, business interests visible on social media — are flags that lead agents to dig deeper.

A defense against unreported income claims requires the same level of rigor the agent is bringing — clean source-and-use schedules, full account reconciliations, and substantiated explanations for anything that would otherwise look like unreported income.

2. Inadequately Documented Deductions

Where unreported income is the largest category by dollars, inadequately documented deductions is the largest by frequency. Almost every business return audit includes scrutiny of major deductions, and the agent’s job is to test whether the deduction satisfies the substantiation requirements imposed by the Internal Revenue Code and the regulations.

Agents are trained on the specific substantiation requirements that apply to common deduction categories:

• Travel and entertainment (T&E). Section 274(d) imposes strict substantiation requirements. The taxpayer must document amount, time, place, and business purpose for each expense. Estimates are not allowed for expenses subject to Section 274(d). T&E logs that look like they were reconstructed in preparation for the audit are scrutinized — and frequently rejected.
• Vehicle expenses. Mileage logs, business-use percentages, and the substantiation of the business purpose for each trip are all developed. Agents are trained to identify reconstructed mileage logs and to challenge implausible business-use percentages.
• Home office deductions. Exclusive use, regular use, and the principal-place-of-business or client-meeting requirements are tested. Photos, square-footage measurements, and the agent’s general impression of whether the home office is genuinely used as represented all factor in.
• Charitable contributions. Substantiation requirements vary by amount and type — cash gifts, non-cash gifts, gifts of $250 or more, and gifts requiring qualified appraisals each have their own rules. Failures of substantiation can disallow otherwise valid deductions in full.
• Section 162 ordinary-and-necessary requirements. Beyond substantiation, the agent tests whether each deduction is genuinely ordinary and necessary for the business — and whether items claimed as business expenses are actually personal.

The defense against deduction challenges is documentation that exists at the time the audit opens, not documentation reconstructed during the audit. Agents are trained to spot reconstruction.

3. Related-Party Transactions

Related-party transactions are a category where agents apply heightened scrutiny because the parties to the transaction are not arms-length. Family members, controlled entities, partners and partnerships, shareholders and corporations — any of these relationships invites examination of whether the transaction was structured and priced as it would have been between unrelated parties.

Common related-party issues agents are trained to develop:

• Intercompany loans. Loans between related entities are tested for whether they are bona fide loans (with stated interest rates, repayment terms, and actual repayments) or disguised distributions, contributions, or compensation. A “loan” without the indicia of a real loan is recharacterized.
• Compensation to family members. Wages paid to spouses, children, or other family members are tested for whether the family member actually performed services and whether the compensation was reasonable for those services.
• Rents to controlled entities. Rent paid by a business to a controlled entity (or to the owner personally) is tested for fair-market rate and arms-length terms.
• Personal expenses paid by the business. Business deductions for items that benefit the owner personally — vehicles, travel, entertainment, residences — are scrutinized for whether they were properly characterized.
• Section 482 and transfer pricing in international contexts. For multinational structures, transfer pricing on cross-border related-party transactions is a major audit focus.

Adjustments in this category can have downstream consequences. Reclassifying a loan as a distribution affects basis and may trigger dividend treatment. Reclassifying compensation as a distribution affects employment tax liability. The agent is often developing not just the immediate adjustment but the consequential adjustments that flow from it.

4. Foreign Accounts and Offshore Activity

Foreign account activity is its own category — not because it generates the largest adjustments by frequency, but because the penalty regime is among the most severe in the tax law. FBAR penalties for willful non-filing can reach the greater of $100,000 (adjusted for inflation) or 50% of the account balance, per violation, per year. Form 8938 penalties stack on top. Information return failures under Sections 6038, 6038A, 6038B, 6038D, and others impose additional penalties.

Agents in this area are trained to identify and develop:

• Unreported foreign accounts. Failures to file FBAR (FinCEN Form 114) or Form 8938 — or both — are a primary focus. The IRS has access to substantial third-party data through FATCA and intergovernmental agreements that allows it to identify foreign accounts the taxpayer did not disclose.
• Unreported foreign income. Income earned in foreign accounts, foreign business interests, or foreign passive income arrangements (like PFIC investments) is examined for proper reporting.
• Foreign business interests. Form 5471 (controlled foreign corporations), Form 8865 (foreign partnerships), Form 3520 and 3520-A (foreign trusts and gifts), and similar information returns are examined for completeness and accuracy.
• Willfulness analysis. Where the foreign account or activity was unreported, the agent develops the willfulness analysis — whether the failure was willful (with the harshest penalties) or non-willful (with significantly reduced penalties under streamlined procedures).

Resolution typically involves streamlined offshore procedures, delinquent FBAR submissions, or delinquent foreign information return submissions, depending on the specific facts and the willfulness analysis. The choice of procedure is consequential — and it is a legal decision, not just an accounting one.

5. Cryptocurrency and Digital Asset Activity

Cryptocurrency is a relatively new audit category, but it has rapidly become one of the most active. The IRS has built out substantial enforcement infrastructure — including Operation Hidden Treasure, John Doe summonses against major exchanges, blockchain analytics partnerships, and expanded reporting under digital asset broker rules — and Revenue Agents working these cases now arrive with more data than most taxpayers expect.

Agents in cryptocurrency examinations are trained to develop:

• Unreported dispositions. Sales, trades, and uses of cryptocurrency are taxable events. Crypto-to-crypto trades are taxable. Spending crypto is taxable. Many returns omit these.
• Basis and holding period reconstruction. Where dispositions were reported but basis was undocumented or implausible, the agent challenges the basis and may treat undocumented basis as zero — significantly increasing the gain.
• Mining, staking, airdrops, and hard forks. These produce ordinary income items that are routinely missed on returns.
• The Form 1040 digital asset question. A “no” answer on the digital asset question paired with known activity is a finding agents log and use — supporting penalty positions and, in serious cases, criminal referrals.
• Foreign exchange use. Cryptocurrency held on foreign-domiciled exchanges raises FBAR and Form 8938 issues that flow back into the foreign account category above.

We covered this category in detail in our article on inside an IRS cryptocurrency audit. For active crypto traders, NFT participants, and DeFi users, this is now one of the highest-probability examination categories.

What This Means for Audit Defense

The five categories above account for the substantial majority of meaningful IRS examination adjustments. A defense team that understands what agents are trained to look for — and the specific analytical techniques they apply — can prepare for the audit before it opens, anticipate the issues that will be developed, and shape the response strategy accordingly.

This is what an IRS-insider perspective on the defense team actually delivers. With Otto Bosch’s background as a former Revenue Agent in the IRS Global High Wealth Group and Alex Kugelman‘s nearly two decades of federal tax controversy experience, Kugelman Law approaches every audit defense matter with working knowledge of the playbook on the other side of the table. Our article on why a former IRS revenue agent attorney changes audit defense covers the team capability in depth.

Representative outcomes from the firm’s audit defense practice include a $365,000 tax debt reduced to a zero-dollar liability, a multi-year audit and non-filing matter resolved with minimal payment, and ten years of unfiled returns brought into compliance with a successful outcome. Results depend on specific facts. Past results do not guarantee future outcomes.

Frequently Asked Questions

What is the most common issue in IRS audits?

Inadequately documented deductions appear in the largest number of business return examinations. Unreported income generates the largest aggregate adjustments by dollars. Most substantive examinations involve some combination of both, plus issues from the other categories above.

How does the IRS know about my foreign accounts?

The IRS receives substantial third-party data through FATCA, intergovernmental information exchange agreements, John Doe summonses against foreign banks and exchanges, and other sources. The assumption that foreign accounts are invisible to the IRS has not been accurate for years and continues to become less accurate.

Do IRS auditors actually do bank deposit analysis?

Yes — particularly in audits of self-employed taxpayers, cash-intensive businesses, and individuals where the agent has reason to suspect unreported income. Bank deposit analysis is a standard examination technique that compares total deposits across accounts against reported gross income to identify gaps.

What records do I need to substantiate business deductions?

Substantiation requirements vary by deduction type. Travel and entertainment expenses subject to Section 274(d) require documentation of amount, time, place, business purpose, and business relationship. Vehicle expenses require contemporaneous mileage logs. Charitable contributions of $250 or more require contemporaneous written acknowledgment. The general principle is that documentation should exist at the time of the expense — not be reconstructed during an audit.

Can the IRS audit cryptocurrency activity?

Yes, and it actively does. The IRS has built substantial enforcement infrastructure for digital asset matters, including blockchain analytics, exchange data obtained through John Doe summonses, expanded broker reporting, and dedicated training for Revenue Agents. Cryptocurrency audits are no longer rare.

Speak With Kugelman Law

If you are facing an IRS or FTB audit, controversy, or complex federal tax matter — or if you have unreported activity in any of the categories above and are weighing how to resolve it — schedule a paid privileged consultation with Kugelman Law. Call (415) 968-1780 or visit our contact page. All consultations are fully protected by attorney-client privilege.

When the IRS opens an examination of your return, the first practical question is who you should hire to defend it. Most taxpayers default to their CPA — and for many routine examinations, that is the right call. Some hire a tax attorney. A few hire an Enrolled Agent. And a small number ask the more sophisticated question: should my defense team include someone who has actually worked as an IRS Revenue Agent?

This article walks through the differences honestly. Tax attorney vs CPA for IRS audit defense is not always the right framing. For some matters, a CPA is exactly what is needed. For others, only a tax attorney can do what the situation requires. And for the most consequential cases, the right answer is a defense team that combines both legal authority and the inside-the-IRS perspective of a former Revenue Agent.

This is how Kugelman Law structures its audit defense practice, and the rest of this article explains why.

The Three Professionals Who Can Represent You Before the IRS

Federal regulations recognize three categories of professionals authorized to represent taxpayers before the IRS:

Tax Attorney

A licensed lawyer admitted to one or more state bars who practices in tax. The defining attributes are legal training, attorney-client privilege, the ability to litigate in court — including U.S. Tax Court, U.S. District Court, and the Court of Federal Claims — and the authority to provide legal advice. Within tax law, attorneys vary widely in specialization. Some focus on planning and transactions; others focus on controversy and litigation. For audit defense, the relevant subspecialty is tax controversy.

Certified Public Accountant (CPA)

A licensed accountant who has passed the Uniform CPA Examination and met state licensing requirements. CPAs are tax preparation, accounting, and auditing professionals. They can represent clients before the IRS in many circumstances. The defining attributes are accounting depth, fluency in financial statements and tax returns, and — for many CPAs — a long-running client relationship built around return preparation.

Enrolled Agent (EA)

A federal credential granted by the IRS itself. Enrolled Agents have either passed the Special Enrollment Examination (a three-part exam covering individual taxation, business taxation, and representation) or qualified through prior IRS employment. EAs have unlimited practice rights before the IRS. Their defining attributes are tax-specific expertise and a federal credential focused entirely on tax matters.

A practitioner can hold more than one of these credentials. Many tax attorneys are also CPAs. Some, like Kugelman Law’s Otto Bosch, are both attorneys and Enrolled Agents — and bring direct prior experience as IRS Revenue Agents.

What Each Professional Can and Cannot Do

The differences become consequential when you look at the specific things each professional can and cannot do during an audit.

All three can represent you before the IRS in audits, appeals, and collections matters. All three can communicate with examiners on your behalf, respond to Information Document Requests, attend conferences, and negotiate settlements. For many routine examinations, this scope of authority is sufficient.

Only attorneys can:

• Provide formal legal advice, including opinions on legal questions
• Litigate cases in federal court — including U.S. Tax Court, U.S. District Court, and the Court of Federal Claims (CPAs and EAs may litigate in U.S. Tax Court only after passing the Tax Court Examination, and even then their authority is limited to that single court)
• Maintain full attorney-client privilege over communications about your case
• Apply privilege protection to work product developed in anticipation of litigation
• Handle matters with parallel criminal exposure within the privileged framework needed to protect the client

That last point — privilege — is the single most consequential difference, and it deserves its own discussion.

The Critical Difference: Attorney-Client Privilege

Communications with a tax attorney are protected by attorney-client privilege when they meet the conditions privilege requires. That means the IRS cannot compel the attorney to disclose what the client told them, and in most circumstances cannot compel the attorney’s notes, analyses, or work product developed in anticipation of litigation.

Communications with a CPA or EA do not have the same protection. The Internal Revenue Code provides a limited “tax practitioner privilege” under Section 7525 — but it is significantly narrower than attorney-client privilege. Section 7525 privilege does not apply to criminal matters. It does not apply to written tax shelter advice. It does not apply in state proceedings. And courts have generally read it more narrowly than many taxpayers expect.

The practical implication is this: if there is any meaningful chance that an examination has criminal implications — which is true in eggshell audits, in cases involving large unreported income, in cases with foreign account issues, and in cases involving cryptocurrency where the digital asset question was answered incorrectly — communications with a CPA or EA are not safely privileged. Communications with an attorney are.

This is why sophisticated tax controversy practice often involves a “Kovel arrangement” — a structure in which a CPA is engaged by the attorney rather than directly by the client, so that the CPA’s work falls within the attorney’s privilege. That structure is appropriate in many controversy matters. It is also a structure that requires an attorney at the center of the engagement.

When You Need a Tax Attorney (and When You Don’t)

Not every IRS audit requires an attorney. A correspondence audit on a missing 1099 or an arithmetic error generally does not. A modest Schedule C examination focused on documentation of business expenses generally does not. For these matters, a CPA or EA — particularly one familiar with the client and the return — is often the right professional to handle the response.

A tax attorney becomes the appropriate choice when one or more of the following is true:

• The dollar amounts are significant. Audits with potential exposure in the high five figures and above generally justify the additional cost of attorney representation.
• The technical issues are complex. Partnership and S-corporation audits, related-party transactions, basis disputes, and characterization questions benefit from legal analysis as well as accounting analysis.
• There is parallel criminal exposure. Eggshell and reverse-eggshell audits require attorney representation for privilege reasons alone.
• Foreign accounts are involved. FBAR penalties, Form 8938 issues, and the willfulness analyses that drive offshore disclosure outcomes are legal questions with severe penalty consequences.
• Cryptocurrency is involved. IRS cryptocurrency audits frequently combine unreported income, foreign exchange use, and digital asset question issues that benefit from legal analysis.
• The case is likely to escalate. Matters that may proceed to Appeals or to U.S. Tax Court litigation need an attorney engaged from the start, because the record built during the examination is what the case is ultimately decided on.
• You disagree fundamentally with the IRS. Where the dispute is not about documenting items but about legal positions the IRS is asserting, attorney involvement is generally appropriate.
• Penalties are aggressive. Civil fraud, substantial understatement, and other significant penalties often require legal defense beyond accounting fluency.

The Often-Overlooked Question: Has Anyone on Your Team Worked Inside the IRS?

Most discussions of tax attorney versus CPA stop at the comparison above. There is a further layer that tends to be invisible from outside the controversy field: the value of having someone on the defense team who has actually worked as an IRS Revenue Agent.

A former Revenue Agent attorney brings something neither a tax attorney nor a CPA can bring on their own — direct, internal experience with how the IRS actually conducts examinations. This includes:

• Knowing what an agent’s first IDR will likely ask for and what the second and third will probably address
• Recognizing when an agent is genuinely committed to a position versus when the agent is fishing
• Understanding the internal review architecture — supervisor review, IRS Counsel coordination, fraud referral pathways — that filters every meaningful decision an agent makes
• Reading the difference between a routine audit and an eggshell audit early enough to adjust strategy
• Building a defense record that anticipates what the IRS will need at Appeals or in Tax Court

This is the perspective Otto Bosch brings to Kugelman Law. Before joining the firm in February 2026, Otto served as a Revenue Agent in the IRS Global High Wealth Group within LB&I — the unit that audits the most complex returns of the wealthiest U.S. taxpayers. He is also an Enrolled Agent and holds an LL.M. in Taxation. We covered this layered advantage in detail in our article on why a former IRS revenue agent attorney changes audit defense, which complements our broader explanation of what IRS Revenue Agents actually do inside an examination.

For taxpayers facing significant IRS examinations, this third dimension — beyond “attorney versus CPA” — is often the deciding factor in case outcomes.

How Kugelman Law’s Team Combines These Capabilities

Kugelman Law is structured deliberately around the capabilities a serious controversy matter actually requires.

Founder Alex Kugelman brings nearly two decades of federal tax controversy experience, including litigation in U.S. Tax Court and U.S. District Court. He is a member of the State Bar of California, served as San Francisco Chair of the Federal Bar Association’s Tax Division in 2018, and is a nationally recognized cryptocurrency tax attorney featured on the Bitcoin.tax podcast and The Mark Milton Show. The litigation capability matters because the credible threat of taking a case to court is what gives administrative resolution its leverage.

Otto Bosch brings the inside-the-IRS perspective from his time as a Revenue Agent in the Global High Wealth Group, plus additional technical depth from his prior role at KPMG’s Washington National Tax practice. He holds an LL.M. in Taxation with a focus on Partnership Tax and is an Enrolled Agent.

The combination — attorney + IRS-insider + crypto fluency + federal litigation capability — is what most controversy practices simply cannot offer. CPAs and EAs working alone cannot provide privilege or court access. Tax attorneys without IRS experience operate without the insider perspective. Firms with neither litigation experience nor inside-the-IRS background are missing both ends of the controversy spectrum.

Representative outcomes from the firm’s audit defense practice include a $365,000 tax debt reduced to a zero-dollar liability, a multi-year audit and non-filing matter resolved with minimal payment, and ten years of unfiled returns brought into compliance with a successful outcome. Results depend on specific facts. Past results do not guarantee future outcomes.

A Practical Decision Framework

For taxpayers trying to decide who should handle their IRS audit, a practical framework:

1. For routine correspondence audits and simple documentation matters — your existing CPA or EA is often the right choice. The cost-benefit analysis favors them.
2. For substantive examinations involving real money or complex issues — engage a tax controversy attorney. The privilege protection alone justifies the choice in many cases.
3. For high-stakes examinations — Global High Wealth, LB&I, multi-year non-filing, foreign accounts, cryptocurrency, or parallel criminal exposure — engage a tax controversy firm whose team includes both senior litigation experience and former IRS-insider perspective.

The decision is not always either/or. Many engagements involve attorney-led representation with a CPA performing supporting accounting work under the attorney’s privilege through a Kovel arrangement. The point is that the highest-stakes cases benefit from legal authority, privilege protection, litigation capability, and inside-the-IRS perspective — and the question is whether your defense team has them.

Frequently Asked Questions

Can a CPA represent me in an IRS audit?

Yes. CPAs have authority to represent taxpayers before the IRS in audits, appeals, and collections matters. For many routine examinations, CPA representation is appropriate. The limitations of CPA representation become significant in cases with criminal exposure, in matters likely to require litigation, and in matters where attorney-client privilege protection is needed.

Do I have attorney-client privilege with a CPA?

Not in the same way you do with an attorney. The Internal Revenue Code provides a limited “tax practitioner privilege” under Section 7525, but it is substantially narrower than attorney-client privilege. It does not apply in criminal matters, in tax shelter advice, or in many state proceedings. For matters where privilege is important, attorney representation is generally needed.

Is a tax attorney more expensive than a CPA?

Generally yes — hourly rates for tax controversy attorneys are higher than CPA rates. Whether the higher cost is justified depends on the matter. For complex, high-stakes, or potentially adversarial cases, attorney involvement frequently produces better outcomes that more than offset the cost difference. For routine matters, a CPA may be the more efficient choice.

What is an Enrolled Agent and how do they fit in?

An Enrolled Agent is a federal credential granted by the IRS. EAs have unlimited practice rights before the IRS and focus exclusively on tax matters. They can represent taxpayers in audits, appeals, and collections. They do not have legal training or attorney-client privilege, and their authority to litigate is limited. Some practitioners — like Kugelman Law’s Otto Bosch — are both attorneys and Enrolled Agents.

Should I keep my CPA involved if I hire a tax attorney?

Often, yes. Many controversy engagements work best when the attorney leads representation and the CPA contributes specialized accounting work — particularly on complex returns, basis reconstructions, and ongoing compliance. The CPA’s work can be performed under the attorney’s privilege through a Kovel arrangement when appropriate. Coordinated team representation is frequently the optimal structure.

Speak With Kugelman Law

If you are facing an IRS audit, controversy, or complex tax matter and want to understand how the right combination of legal authority, IRS-insider perspective, and federal litigation capability can shape your defense, schedule a paid privileged consultation with Kugelman Law. Call (415) 968-1780 or visit our contact page. All consultations are fully protected by attorney-client privilege.