What an Enrolled Agent Does in an IRS Audit, Step by Step

The IRS audits roughly 0.4% of individual returns in a typical recent year, and most of those never involve a face-to-face meeting. That number should calm you down, not because your odds are good in the abstract, but because it tells you what an audit usually is: a paperwork exchange with a specific scope, worked on a schedule. It is a process. Processes can be handled. Here is what an Enrolled Agent (EA) actually does across that process, in the order it happens, and where going alone costs you.

An EA is one of three types of practitioner with unlimited rights to represent taxpayers before the IRS, alongside CPAs and attorneys, under Circular 230 (31 C.F.R. Part 10). The credential comes straight from the Treasury. What follows is how that authority gets used.

Step 1: Read the notice and identify the type of audit

The first job is to figure out which of three audits you are actually in, because they run differently.

There are three flavors:

• Correspondence audit. Conducted entirely by mail. The IRS asks you to substantiate one or a few line items (charitable contributions, a dependent, education credits). Most individual audits are these.
• Office audit. You are asked to bring records to a local IRS office and meet an examiner.
• Field audit. A revenue agent comes to your home, business, or representative's office. These are the deepest, usually reserved for businesses and higher-complexity returns.

An EA reads the opening letter (often a CP2000 for automated underreporter matches, or a Letter 2205 or 566 for a genuine examination) and pins down two things: the exact items under exam and the response deadline. A CP2000, for the record, is not technically an audit. It is a proposed change from document matching, and it says the IRS is proposing to adjust your return based on information it received. It gets answered, not ignored, and often it gets answered with a simple explanation the software could not see.

Step 2: File the power of attorney and take over communication

Before anything substantive happens, the EA files Form 2848, Power of Attorney and Declaration of Representative.

Once Form 2848 is on file, the IRS is authorized to deal with your representative directly. This does one concrete thing that matters more than people expect: it takes you out of unscripted conversation with the examiner. Under §7521(c), the IRS generally cannot require you to appear in person if you have authorized a qualified representative, absent a summons under §7602. You do not have to be in the room. The examiner talks to the EA.

That is the quiet center of the "don't go alone" argument. It is not that you will say something dishonest. It is that a nervous taxpayer answers the question that was asked and then keeps talking, and the volunteered sentence opens a door to a year, a line item, or an account nobody was looking at. An EA answers the question, stops, and lets the record do the rest.

Step 3: Confirm and contain the scope

The EA's next move is to nail down what is on the table and keep it there.

An audit has a defined scope. It is not an open-ended search of your financial life. The examiner selected specific issues, and the response should address those issues and no more. When you hand over a shoebox instead of the four documents that answer the four questions, you invite the examiner to notice a fifth thing.

Here is a worked example. A freelance graphic designer, single, filing Schedule C, got an office audit letter questioning $31,000 in claimed business expenses. She had good records but had planned to walk in with two years of bank statements "to be safe." That would have exposed a second year that was not under exam and a personal account with deposits that looked like unreported income until explained. Instead, the response was built to the letter: a mileage log tied to §274(d)'s strict substantiation rules, receipts and invoices for the software and subcontractor costs, and a one-page reconciliation. Scope stayed on the one year and the one Schedule C. The adjustment came down to about $2,100, most of it a mileage-log gap, and nothing else got opened.

Step 4: Assemble substantiation that matches the burden

The EA builds the documentary record to the standard the specific deduction requires, because the burden of proof generally sits with you under §7491 unless narrow conditions are met.

Not every deduction is proven the same way. Some line items carry a heightened standard:

Item	Governing rule	What actually substantiates it
Auto, travel, meals	§274(d)	Contemporaneous log: date, amount, business purpose, mileage
Charitable gifts $250+	§170(f)(8)	Contemporaneous written acknowledgment from the charity
Business expenses	§162 / §6001	Receipts, invoices, proof of payment, business purpose
Casualty / basis	§1012, §165	Purchase records, improvement records, insurance

The point of the table is that "I have receipts" is not always enough. A meal deduction with a receipt but no noted business purpose fails §274(d) even though the money was clearly spent. An EA knows which items need the extra layer and builds it before the examiner asks.

Step 5: Respond, negotiate, and read the results letter

The EA presents the record, handles the examiner's follow-ups, and reviews what the IRS proposes.

When the exam closes, the IRS issues its findings, often on Form 4549, Report of Income Tax Examination Changes. This is where an EA earns the fee twice. The report may include adjustments that are correct, adjustments that are defensible either way, and adjustments the examiner made because the documentation was thin rather than because the position was wrong. Each gets a different response: agree, supplement, or contest. Interest keeps running under §6601 while this plays out, and the failure-to-pay and accuracy-related penalties (§6662's 20% for substantial understatement) are frequently negotiable when you can show reasonable cause or a good-faith position.

Step 6: Preserve appeal rights if you disagree

If the examiner's result is wrong and cannot be resolved at the desk, the EA keeps your appeal rights alive.

You are not stuck with the examiner's number. If you disagree with the findings, you can request review by the IRS Independent Office of Appeals, and the "30-day letter" that accompanies an unagreed report gives you that window. Fail to respond and the next document is a Statutory Notice of Deficiency (the "90-day letter") under §6212, which is the ticket to Tax Court under §6213 and also the point where casual becomes serious.

An EA has unlimited practice rights and can represent you through examination and Appeals. Tax Court litigation is a separate matter: representation there generally requires an attorney or admission to the Tax Court bar, so an honest EA tells you when the case has crossed into territory where you should consult a tax attorney. Knowing that line, and saying so, is part of the job.

Why the representation is worth it even for a small audit

The value is not drama. It is that the examiner does this every day and, unrepresented, you do not.

An EA controls the scope, matches the proof to the standard, keeps you out of freelance conversation, and preserves the deadlines and appeal rights that turn a bad first result into a survivable one. On a correspondence audit over a single credit, that may be an hour of work. On a field audit of a Schedule C, it is the difference between a contained adjustment and an open-ended one. Either way, the person across the table is not neutral about the outcome, and neither should the person on your side be.

Sources

• 31 C.F.R. Part 10 (Circular 230), practitioner representation rights
• IRC §7521(c), taxpayer not required to appear with authorized representative
• IRC §7602, examination and summons authority
• IRC §7491, burden of proof
• IRC §6001, requirement to keep records
• IRC §162, trade or business expenses
• IRC §170(f)(8), substantiation of charitable contributions
• IRC §274(d), substantiation for travel, meals, and listed property
• IRC §6601, interest on underpayment
• IRC §6662, accuracy-related penalty
• IRC §6212 and §6213, notice of deficiency and Tax Court petition
• Form 2848, Power of Attorney and Declaration of Representative
• Form 4549, Report of Income Tax Examination Changes
• CP2000 notice; Letter 2205 and Letter 566 (examination notices)