There is no universal Form 3911 fax number. For an individual refund trace, use the IRS route for the state where you live or the international category. Businesses use separate Cincinnati or Ogden routes. Check the destination before sending your signed form.

Form 3911, Taxpayer Statement Regarding Refund, gives the IRS the information needed to trace an issued refund that you did not receive, or a refund check that was lost, stolen or destroyed. It is a refund inquiry, not a tax return or a request to speed up a return that is still being processed.
The form includes individual and business returns and asks whether the refund was a check or direct deposit. Download the current IRS Form 3911 PDF and follow any instructions the IRS sent with your refund inquiry.
There is no single Form 3911 fax number. For individuals, choose the state where you live from the list below, unless you fall into the international category. Business entities use the separate routes after that list. If the IRS supplied a fax number on your form or specific instructions for your inquiry, follow those instructions.
Routing checked on October 21, 2026 against the official IRS Form 3911 routing page. Confirm the current destination before you send. The IRS says not to send anything other than Form 3911 to these fax numbers.
855-203-7538 — Austin Refund Inquiry Unit: Use this route if you live in a foreign country, U.S. possession or territory; use an APO or FPO address; file Form 2555 or Form 4563; or are a dual-status alien. Check these conditions before choosing a domestic state route.
Use the business routing rather than the individual state list for a business refund trace. If your business location does not clearly fit the published rule, confirm the destination with the IRS before sending. The official routing page also lists mailing addresses if you choose to mail the form.
Confirm your IRS destination, then attach a clear copy of the completed, signed Form 3911 in Fax.Plus. Enter the full fax number with country code +1, check every page and send. Save the delivery confirmation with your copy of the form. A successful transmission does not mean the IRS has reviewed or completed your refund trace.
If you still have a refund check that was not cashed within one year of its issue date, the form directs you to contact the IRS for instructions on returning it. Do not treat the general lost-check process as instructions for that situation.
The refund trace process covers these situations:
Check your refund status and the applicable IRS instructions before starting a trace. For an expected paper check and a filing status of Single, Married Filing Separately or Head of Household, the IRS encourages starting with its self-help methods, including Where’s My Refund?. Form 3911 is not a general remedy for every delayed refund.
No. Individuals use the route for the state where they live, with a separate route for international and other listed cases. Business entities use Cincinnati or Ogden. Follow any destination the IRS supplied for your refund inquiry and confirm the current routing before sending.
Yes. The IRS publishes mailing addresses alongside the Form 3911 fax routes. If the IRS sent you the form with a return envelope or a destination for your case, follow those instructions. Use one submission route unless the IRS asks you to send another copy.
Yes, when the refund is from a joint return, both spouses must sign before the IRS can begin a trace. For a business return, the person authorized to sign the refund check signs the form and enters their title.
Complete a separate Form 3911 for each refund you want traced. Identify the return type, refund type, amount, tax period and filing date for that refund, and complete the applicable sections.
No. A successful fax confirmation records transmission to the receiving fax system. It does not confirm IRS review, completion of the trace or issuance of a replacement refund. Keep the completed form and delivery confirmation for any follow-up.
Need a different IRS form or a way to send your completed refund trace? Explore the related IRS and online fax resources below.
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