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 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.