Short answer
An audit response cover letter goes on top of the records you send the IRS. It names you, your taxpayer ID, the tax year and the IRS letter and date you are answering, then lists each enclosed copy against the item requested. Send photocopies, not originals, by the method on the letter, and keep proof the IRS received it.
Key takeaways
- The cover letter answers the IRS’s written request item by item, so number your exhibits to match the items in the letter or Form 4564.
- Send photocopies, never originals, with a copy of the IRS letter, and explain any item you cannot fully document.
- Fax, mail or upload as the letter allows; when faxing, put your name and Social Security number on every page.
- Get proof the IRS received it; for mail audits the IRS says it acknowledges documents received by mail or fax within 30 days.
- A template is a starting point, not legal advice, and it does not guarantee the IRS will accept your records.
When to use an audit response cover letter
Use this cover letter any time you send records the IRS asked for during an audit. The IRS audits page says the IRS “will provide you with a written request for the specific documents we want to see,” and that request is what your letter answers. Common cases:
- A mail audit letter such as a Letter 566, which lists the items under review and the records to send.
- An Information Document Request on Form 4564 in an office or field audit. The IRS manual says a Form 4564 lists “the specific records, information, and documents” the examiner wants and “must always include a date for submission” (IRM 4.10.2, revised August 28, 2025).
- More proof after a proposed change. Publication 3498-A says that if you disagree with the changes, you should not sign the agreement page and should send documentation and an explanation that support your position.
It is not the right letter for everything. A CP2000 is an automated income-matching notice, not an audit, and comes with its own response page. To ask the IRS Independent Office of Appeals to review a 30-day letter, use the small case request or the formal protest template instead. And once you hold a notice of deficiency, sending more documents does not stop its Tax Court deadline.
This template is a starting point you adapt to your letter, not legal advice, and no cover letter guarantees that the IRS will accept your records. What it does is make your response easy to match against the request, so nothing is overlooked.
What to put in the envelope
Build the package around the IRS request, item by item. Publication 3498-A tells taxpayers in mail audits to “attach photocopies of your original documents to the letter” and send them to the address or fax number provided, and adds: “Please do not send original documents.”
| Include | Why |
|---|---|
| A copy of the IRS letter or Form 4564 | Ties your response to the right case, tax year and examiner |
| This cover letter | Lists every enclosure against the item it supports |
| Photocopies of records, grouped and labeled by item | The examiner can check each item without sorting a pile |
| A short explanation for any item you cannot fully document | Publication 3498-A asks you to “provide an explanation of the issue and how the amount was determined” |
| Form 2848, if a representative will talk to the IRS for you | Lets the examiner deal with that person; see Form 2848 |
Leave out what the request does not ask for. Every page you send becomes part of the file, so answer the request completely and stop there. If a record is missing, say so, explain how you arrived at the figure, and label anything you rebuilt as a reconstruction with the date you prepared it. Never create or backdate a document; our guide to an audit with missing records explains what the IRS accepts instead.
If you have too many records to fax or mail, Publication 3498-A says to call the number on the letter; you may be asked for an itemized list of the expenses in question. The IRS audits page adds that you can ask for a face-to-face audit when there are too many records to mail.
How to send it and prove the IRS got it
Use the method your letter gives. The common options:
| Method | What the IRS says | Your proof |
|---|---|---|
| Fax | Publication 3498-A: put your name and Social Security number on each page you fax so every page is associated with your case | The fax confirmation sheet showing pages sent |
| The IRS audits page: for any delivery service, “always request confirmation that the IRS has received your response”; the Postal Service offers add-on services for delivery confirmation | The mailing receipt and delivery confirmation | |
| IRS Document Upload Tool | Accepts JPG, PNG or PDF files sent in response to a notice or letter, using the access code if one is provided or the letter number; it confirms receipt. Don’t submit tax returns through it. | The on-screen confirmation (save or print it) |
For mail audits, Publication 3498-A says the IRS will send a letter within 30 days acknowledging documents received by mail or fax. If your letter lists 866-897-0177 or 866-897-0161 as the contact number, the IRS audits page says you can check the audit in your IRS Online Account under “Records and Status,” including the next response date.
Running short of time? For mail audits, the IRS audits page says to fax a written request to the number on the letter and that it “can ordinarily grant you a one-time automatic 30-day extension.” For in-person audits, ask the assigned auditor. Send what you have by the due date and say in the letter what is still coming. More on timing is in the first steps after an audit letter.
The template
Fill in everything in [square brackets] and delete the options that don’t apply. Keep it to one or two pages; the exhibits carry the detail.
[Your full name]
[Spouse’s full name, if the IRS letter is addressed to both of you]
[Street address]
[City, State ZIP code]
[Daytime phone number]
[Date you send the letter]
Internal Revenue Service
[Examiner’s name or ID number, or the unit named on the letter]
[IRS mailing address or fax number exactly as shown on the letter]
Re: Response to [letter or form number, for example Letter 566 or Form 4564] dated [date printed on the IRS letter]
Taxpayer name(s): [Name(s) exactly as shown on the IRS letter]
Taxpayer identification number: [SSN, ITIN or EIN as shown on the IRS letter]
Tax form and tax year(s): [Form 1040, Schedule C, etc.] for [tax year(s) under examination]
Response due date on the letter: [due date]
Dear [Examiner’s name, or Sir or Madam]:
This letter responds to your [letter / Information Document Request] dated [date], which asked for records supporting the items listed below. I am enclosing photocopies of the records. I have kept the originals and can make them available if you need to see them.
The enclosures are numbered to match the items in your request:
- [Item as the IRS describes it, for example “Car and truck expenses, Schedule C, line 9”]: Exhibit 1, [short description of the documents], [number] pages.
- [Item as the IRS describes it]: Exhibit 2, [short description of the documents], [number] pages.
- [Item as the IRS describes it]: Exhibit 3, [short description]. [If records are incomplete: The original receipts could not be located. Exhibit 3 is a summary I prepared on [date] from [bank statements, invoices, calendar entries], with an explanation of how I determined the amount.]
[Optional, if something is still coming: The records for item [number] are being requested from [bank, supplier, former employer]. I expect to send them by [date]. / As discussed with [name] on [date], I will send them by [date].]
A copy of your letter is enclosed as the first page of this response. Please confirm that you have received it. If you need more information about any item, please contact me at [phone number] between [hours and time zone][, or contact my authorized representative, [representative’s name], at [phone number], under the Form 2848 that is enclosed / already on file].
Sincerely,
[Signature]
[Printed name]
[Spouse’s signature and printed name, if the letter is addressed to both of you]
Enclosures: copy of the IRS letter; Exhibits 1 to [number]; [Form 2848, if a representative will speak for you]
A filled-in example
Example (assumed facts). Dana Ruiz, a self-employed photographer, gets an IRS Letter 566 dated September 15, 2026 asking for records for three items on her 2024 Schedule C: car and truck expenses, supplies, and contract labor. The letter gives a fax number and a mailing address. Her cover letter would read, in part:
- Car and truck expenses, Schedule C, line 9: Exhibit 1, mileage log for 2024 kept in a phone app (printout, 14 pages) and repair invoices showing odometer readings (3 pages).
- Supplies, Schedule C, line 22: Exhibit 2, credit card statements with the supply purchases highlighted (12 pages) and seller order histories (9 pages).
- Contract labor, Schedule C, line 11: Exhibit 3, Forms 1099-NEC she issued to two second shooters (2 pages), their invoices (6 pages) and bank transfer records (4 pages).
She faxes the letter and all exhibits, with her name and Social Security number on every page, keeps the fax confirmation sheet, and calendars a check-in if no acknowledgment arrives in about 30 days. Facts and documents are assumed for illustration only.
What happens after you send it
Publication 3498-A describes two outcomes in a mail audit. If the IRS accepts your documentation, it sends a letter saying it accepts your return as filed; keep that letter with your tax records. If it does not, it sends a letter explaining the proposed changes. In office and field audits, the IRS manual tells examiners to warn that more records will probably be requested as the audit goes on, so a second Form 4564 is normal and not a sign that something went wrong.
If changes are proposed and you disagree, don’t sign the agreement page. Read your choices at the 30-day letter and whether to agree or appeal. Keep a complete copy of everything you sent, in the same order, so you can refer to “Exhibit 2” in a later call or appeal.
Many people answer a mail audit on their own with this letter. Help is worth considering when the request covers several years or business income, records are missing for large items, or the examiner’s questions go beyond the items listed. Low Income Taxpayer Clinics represent eligible taxpayers in audits for free or a small fee, and the Taxpayer Advocate Service (877-777-4778 (IRS.gov, 2026)) helps when an IRS problem causes hardship or normal channels have failed. Global Gate Tax Relief’s team includes licensed tax attorneys, enrolled agents and CPAs; it offers a free consultation and, if it takes the case, quotes a flat fee upfront. No outcome is guaranteed. Request a free review of your audit letter or call 1-877-800-8180.
Frequently asked questions
No rule requires one, but it helps. A cover letter identifies you, the tax year and the IRS letter you are answering, and lists each enclosure against the item it supports, so the examiner can match your records to the request. Include a copy of the IRS letter as well.
Often. The IRS Document Upload Tool accepts JPG, PNG and PDF files sent in response to a notice or letter, using the access code if one is provided or the letter number, and confirms receipt. Use it when your letter offers it; otherwise use the mail or fax details on the letter.
Keep the fax confirmation, a delivery confirmation from your mail carrier, or the upload tool’s confirmation. For mail audits, Publication 3498-A says the IRS sends a letter within 30 days acknowledging documents received by mail or fax.
Send what you have by the due date and explain the gap. Publication 3498-A asks you to explain the issue and how the amount was determined. Rebuild what you can from bank statements and third-party copies, and label any reconstruction as prepared later.
If the audit letter is addressed to both of you for a joint return, it is sensible for both to sign so the response clearly comes from both taxpayers. If a representative will speak for either of you, each spouse files a separate Form 2848.
Sources
- IRS: IRS audits (reviewed 17 Feb 2026)
- IRS Publication 3498-A, The Examination Process (Audits by Mail) (Rev. 5-2021)
- IRS: IRS Document Upload Tool (reviewed 27 Aug 2026)
- IRM 4.10.2, Pre-Contact Responsibilities (08-28-2025): Form 4564 requirements
- IRS Publication 3498, The Examination Process (Rev. 5-2025)
- IRS: Low Income Taxpayer Clinics
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