IRS Form 14039-B fax number (business identity theft)

Where to fax Form 14039-B, Business Identity Theft Affidavit, to the IRS.

Verified October 21, 2026Checked against Form 14039-B (May 2021), Business Identity Theft Affidavit, Submitting Form 14039-B.

IRS Form 14039-B fax number (business identity theft): which number to use
Who uses it	Office	Fax
Businesses that did not receive an IRS notice or letter about this issue	IRS business identity theft affidavit fax (toll-free)	855-807-5720

Before you fax

If you received an IRS notice or letter about this issue and it shows a fax number, send the form there; if it shows none, follow the mailing instructions on the notice or letter.
The form suggests including a cover sheet marked "Confidential".

Last verified October 21, 2026

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