What Form 14039 does
Form 14039 tells the IRS about certain tax-related identity theft affecting an individual or dependent. Most people do not need to file it: check the IRS identity theft guide first, especially if the IRS already sent you a letter or you used its identity verification service.
Check the form before faxing
- Confirm that your situation matches a reason listed in Section B. Do not send another Form 14039 for an incident you already reported.
- Complete Sections A through E, including the signature. Complete Section F and attach the required documents if you are filing for someone else.
- Include a cover sheet marked “Confidential.” Choose one submission method: online, mail, or fax. The IRS says not to use all three.
Where to fax Form 14039
If you are responding to an IRS notice or letter, send Form 14039 to the fax number on that notice when one is provided. If the notice has no fax number, follow its mailing instructions instead.
For other eligible submissions, the February 2026 form lists the general identity theft fax number below. This line is not for an original tax return.
No notice-specific route: 855-807-5720
Use only when the form’s general fax instructions apply; a fax number on an IRS notice takes priority.
Use this number after checking the IRS pageSend your completed form
Upload your completed PDF or scan, enter the IRS fax number you confirmed, then review the prepared pages and price before payment. Standard web faxing starts at $3.50 for 1–10 pages, with no account or subscription. You are charged only after successful fax delivery.
Send Form 14039OneFaxNow sends outbound faxes only. It does not prepare the IRS form or confirm IRS acceptance.
After the fax is delivered
Keep the signed affidavit and delivery confirmation. The IRS must review the report separately; a delivered fax does not mean it has marked or corrected your tax account.
Questions about Form 14039
Should I fax Form 14039 if the IRS sent me a notice?
Read that notice first. If it gives a fax number for the affidavit, use it. If it does not, the Form 14039 instructions say to follow the notice’s mailing directions.
Can I send my tax return to the Form 14039 fax number?
No. The IRS says to send an original return to its normal filing destination, not the identity theft affidavit fax line.