Audit Reconsideration: How to Reopen an Audit the IRS Already Closed

Audit reconsideration is the IRS’s process for re-evaluating an audit it has already closed and assessed — across all three exam types, not only the mail audits the IRS’s own consumer page describes. It exists for one situation above all: the assessment was built without the documents that would have changed it. Maybe the audit letters went to an old address and you never saw them. Maybe you could not gather the proof in time. The tax is now assessed, but the examination function can reopen its own work — if your case passes the eligibility screen and you send the right package. The process is governed by IRM 4.13.1 and explained to taxpayers in Publication 3598, “What You Should Know About the Audit Reconsideration Process.”

General information, not tax or legal advice. Reconsideration carries no fee and no formal deadline, but a request alone does not pause collection — read the mechanics section before relying on it.

The eligibility screen: four doors in

The IRS will consider a reconsideration request when one of these fits your case:

1. You have new information — documents or evidence the examiner never considered.
2. You never participated — you did not appear or provide information during the audit, including because you moved and never received the IRS letters.
3. You disagree with the assessment — you believe the audit’s conclusions are wrong and can show why.
4. The IRS made an error — a processing or computational mistake in how the assessment was built.

If none of the four describes your case, reconsideration is not your vehicle. And check the exclusions first — they are absolute.

The hard exclusions — check these before you write anything

• You already paid the liability in full. A paid-in-full assessment is not reconsidered. The route for tax you have already paid is an amended return with a refund claim (Form 1040-X).
• You signed a Form 906 closing agreement covering the issue. A closing agreement is final by design.
• The liability was resolved by an accepted offer in compromise. The compromise settles the amount; reconsideration cannot reopen it.
• A court has finally decided the issue. A final court decision ends the matter for that issue and period.

Most pages on this process bury these limits or skip them. They come first here because a request filed into an exclusion is simply closed — without the re-examination you were counting on.

Building the package, in the IRS’s own order

1. Start from the audit report. Take Form 4549, the report behind your assessment (reading it is covered by the Letter 525 guide), and identify, line by line, each adjustment you dispute and the new evidence for it.
2. Write it per issue. Either a letter explaining each disputed issue, or Form 12661 (Disputed Issue Verification) — one block per disputed issue, each block matched to its supporting documents. An undifferentiated pile of paper is the most common reason requests stall.
3. Send copies, never originals. The IRS does not return documents submitted with a reconsideration request.
4. Send it to the office that handled your audit — the address on your last audit correspondence. Requests arising from correspondence exams may also be submitted through the Document Upload Tool (irs.gov/examreply). Keep proof of mailing or submission either way.

The classic reconsideration case in this cluster is a disallowed credit: credits frozen and then denied under Notice CP75 can be restored if the qualifying-child proof that never reached the examiner is sent now — assembled to the standard in the record-keeping checklist. For mail audits, this is also the exit the correspondence audit lifecycle points to once the case has closed against you.

The honest mechanics

• No fee, no formal deadline — but delay works against you: interest keeps running on the assessed balance, and collection does not wait.
• Expect an acknowledgment in about 30 days. That figure is practitioner consensus about IRS practice, not a promised IRS deadline; complex cases take longer.
• A request does not, by itself, stop collection. Under IRM 4.13.1.3.3, IRS employees are instructed not to input a collection hold merely because a reconsideration request arrived — the hold decision comes after your documentation is reviewed. So ask explicitly for collection to be held while the request is reviewed, and keep responding to collection notices in the meantime.
• It is not an appeal and not a court. Reconsideration reopens the examination function itself, and it exists only inside examination — penalty appeals and collection appeals are separate processes with separate doors. If the re-examination still goes against you, the remaining routes depend on your posture: Appeals where that door is still open, pay-and-claim-refund, or a Tax Court petition where a petition right still exists (Tax Court basics).

Frequently asked questions

What is IRS audit reconsideration? It is the IRS’s process for re-evaluating an audit assessment after the audit has closed (IRM 4.13.1; Publication 3598). It applies when you have information the examiner never considered, never got to participate in the audit, disagree with the assessment, or the IRS made a processing or computational error. Unlike the IRS’s consumer page, which addresses correspondence exams, the process covers office and field audits as well.

How do I reopen an IRS audit through reconsideration? Work from Form 4549: identify each adjustment you dispute, then send the IRS office that handled your audit either a letter explaining each disputed issue or Form 12661 — one block per issue — with copies of the new supporting documents indexed to each issue. Correspondence-exam requests can also be sent through the Document Upload Tool (irs.gov/examreply). Keep proof of submission, and send copies only, never originals.

Can I request audit reconsideration if I already paid the tax? No. A liability that has been paid in full is outside reconsideration — that is one of the process’s hard exclusions, along with a signed Form 906 closing agreement, an accepted offer in compromise, and a final court decision. For tax already paid, the correct vehicle is an amended return and refund claim on Form 1040-X.

How long does audit reconsideration take? Expect an acknowledgment in about 30 days — practitioners’ consensus on IRS practice, not an IRS-guaranteed deadline — and longer for complex cases. There is no fee and no formal filing deadline, but the assessed balance keeps accruing interest while you wait, and collection is not automatically held, so filing promptly and asking for a collection hold are both worth doing.

Sources: IRS.gov — “Audit reconsideration” and “Audit reconsideration process for correspondence examination”; IRS Publication 3598 (Rev. 11-2023); IRM 4.13.1 (audit reconsideration), incl. §4.13.1.3.3. Currency verified 2026-10-23.