Form 4549: Reading the IRS Audit Report Before You Sign It

Every audit that changes your tax ends up on a form. For individual income tax exams, that form is usually Form 4549, Income Tax Examination Changes. Some people call it the audit report or the RAR. Whatever you call it, it is the most important piece of paper in the case.

The IRM explains why. Audit reports serve as the basis for assessment and collection action, and unlike workpapers, "reports are legally binding documents" (IRM 4.10.8.2.1). When you sign one, you are not acknowledging receipt. You are agreeing.

What is on the form

Form 4549 shows, year by year:

• Each proposed adjustment to income, deductions or credits, with the amount.
• The corrected taxable income and the corrected tax.
• Any penalties the examiner proposes.
• The resulting deficiency (or overassessment, if the IRS owes you).
• Interest computed to a stated date.

Attached to it you should find an explanation of each adjustment. For office exams, the IRM says examiners use standard explanations that include enough information to enable you to challenge the issue. For field exams, the examiner attaches a lead sheet for each issue, formatted with a conclusion, the facts, the law and your position, and the IRM requires that facts favorable to both the IRS and the taxpayer be included (IRM 4.10.8.12.4). Often you will see these on Form 886-A, Explanation of Items.

If the explanation for an adjustment is thin, ask for a better one. You are entitled to understand the basis of what you are being asked to agree to. The IRM frames audit reports as protecting your "Right to be Informed."

Reading it like an examiner

1. Match every adjustment to an issue in the exam. If something appears on the report that was never discussed, ask why before you go further.
2. Check the arithmetic. Recompute the tax yourself or have your preparer do it. A disallowed deduction can change your bracket, phase out a credit, or affect self-employment tax.
3. Look for adjustments in your favor. If you identified a missed deduction or credit during the exam, it should be on the report.
4. Read the penalty section separately. The tax and the penalty are different questions. The IRM reminds examiners that certain penalties require timely written supervisory approval under IRC 6751(b) or they cannot be asserted (IRM 4.10.8.6.2).
5. Check the years. Multi-year exams produce multi-year reports. Make sure you understand which years are agreed and which are not.

What signing actually does

Normally, the IRS cannot assess additional income tax until it mails you a notice of deficiency and the 90-day period to petition the Tax Court passes (IRC 6213(a)). Section 6213(d) gives you the right, by a signed notice in writing, to waive those restrictions on assessment and collection for all or part of the deficiency.

A signed Form 4549 is that waiver. Sign it, and the IRS assesses the agreed amount without sending a notice of deficiency. That means you give up the pre-assessment trip to the Tax Court for those adjustments. If you later decide you were wrong to agree, your path is generally to pay and seek a refund, or to seek audit reconsideration if the balance is unpaid and you have new information. Both are harder than not signing too soon.

A few more mechanics worth knowing:

• Joint returns need both signatures. To process a case as agreed, the IRM requires the signature of both spouses (or their authorized representatives) unless the deficiency is paid in full. If only one spouse signs, unagreed procedures apply to the other (IRM 4.10.8.2.4.2).
• Do not write conditions on it. The IRM tells examiners to be very cautious with agreements where taxpayers added writing besides their signatures, and states that conditional statements invalidate an agreement. If you have a condition, negotiate it before you sign.
• Signing affects interest. Under IRC 6601(c), as the IRM explains, a signed agreement or waiver stops the running of interest 30 days after the IRS receives it if the assessment and notice and demand are not made within that 30-day period.
• Faxed signatures are accepted. The IRS can accept consents to assess additional tax by fax.

Agreeing to part of it

You do not have to accept or reject the whole report. Partial agreements are common and the IRM provides for them.

When you agree to some issues before requesting an Appeals conference, the examiner prepares multiple reports: a regular Form 4549 showing everything, a Form 4549-A "Agreed" report showing only the agreed adjustments with a Form 870 waiver for the agreed deficiency, and a Form 4549-A "Total" report showing all adjustments but only the unagreed deficiency (IRM 4.10.8.6.2.1).

The IRM notes that revenue agents generally have opportunities to secure a partial agreement before issuing a 30-day letter, while tax compliance officers usually issue the 30-day letter with the first report and handle partial agreements once you request an Appeals conference. Either way, agreeing to the issues you cannot win and contesting the ones you can is often the smartest move. It narrows the fight and stops interest on the agreed part.

If you disagree: the 30-day letter

When you do not agree, the report usually arrives with or is followed by a 30-day letter. The IRM describes 30-day letters as transmitting the exam findings and allowing you 30 days to request Appeals consideration or take the other actions described in the letter (IRM 4.10.8.12.1). For office exams, Letter 915 commonly transmits both agreed and unagreed reports. In campus exams, it is Letter 525.

Your options at that point:

• Provide more information. The examiner can revise the report.
• Ask for a conference with the examiner's manager. The IRS lists this option on its audit page.
• Request Appeals consideration by filing a protest or small case request within the time allowed. The Appeals process itself is a separate topic; Publication 3498 and the letter explain it.
• Do nothing. The IRM says that if no protest is filed, a deficiency case is closed to Technical Services for issuance of a notice of deficiency (IRM 4.10.8.12.10).

Need more time? The procedural rules do not provide for an extension of the 30-day letter, but the IRM says extensions may be granted under reasonable circumstances, such as hiring a representative who needs time to prepare a protest, illness, or complex issues. Ask in writing with a reason. Extensions are normally granted for no more than 30 days (IRM 4.10.8.12.8). Time on the statute of limitations matters here too. Appeals generally needs at least 365 days left when it receives a case, so you may be asked to extend the statute to keep the appeal option alive.

No change reports

Not every report proposes tax. When a field or office exam ends with no adjustments, the examiner gives you a no-change report stating that it is subject to approval, followed by Letter 590, the no-change final letter, after the group manager signs off (IRM 4.10.8.3.1). Keep both. If the same issue comes up again in a later year, that letter matters. See repetitive audits and reopening closed cases.

Paying while you decide

If you think you will owe at least part of the proposed amount but are not ready to sign, you can stop interest by paying or by making a designated deposit under IRC 6603. I cover how that works, and how it interacts with a 30-day letter, in audit deposits under section 6603.

The bottom line

Form 4549 is where the audit becomes binding. Do not sign it at the closing conference just to make the meeting end. Take it home, check every adjustment and every number, and decide issue by issue. If you want someone to review it with you, that is exactly the moment to call. Signing is easy. Unsigning is not.