How to Fax Tax Documents Without Going to FedEx

Learn how to send tax documents securely without visiting FedEx or any physical location. Onetime Fax provides instant faxing for tax forms.

Deep dive: How to Fax the IRS · Troubleshooting: Fix failed faxes

Can I fax documents to the IRS?
Yes, but only specific workflows accept fax (e.g., identity verification responses, certain notice responses, correspondence exams, and some POA submissions when instructed). Always use the fax number listed on your IRS notice or instructions. If none is provided, call the IRS at 800‑829‑1040 to confirm.
What is the correct fax number for my IRS case?
IRS fax numbers are case‑ and department‑specific. Use the number shown in the upper‑right of your CP/Letter notice or in the instructions you received. For international taxpayer assistance use +1 (267) 941‑1055; for the Taxpayer Advocate Service use +1 (855) 297‑0055. Verify before sending.
International CAF Team fax for Form 2848 (outside the U.S.)?
Use +1 (267) 466‑1017. The previous +1 (267) 941‑1017 is no longer in service. If sending from within the U.S., the domestic fax remains +1 (855) 772‑3156. Source: IRS Instructions for Form 2848 (Rev. 2015).
Should I fax original tax returns like Form 1040?
Generally no. Original returns (e.g., Form 1040) are not accepted by fax. Use e‑file or mail, unless a specific IRS unit instructs you to fax for your case.
How should I format and prepare my IRS fax?
Create a single PDF in this order: cover sheet → IRS notice/letter → your response → supporting documents. Use black text on white background, 300 DPI if scanned, and number pages (1/7, 2/7…). Include your name, last 4 of SSN/TIN, notice number, tax year, phone, and page count on the cover.
Is it secure to fax the IRS?
Use an encrypted online fax service. Onetime Fax uses SSL encryption in transit and deletes files after delivery. Include only the last 4 digits of SSN/TIN on the cover sheet and minimize sensitive data where possible.
How much does it cost to fax the IRS?
Retail locations often charge per page. With Onetime Fax, the price is a flat $5 per fax (unlimited pages).
When should I send my IRS fax?
Send during IRS business hours for faster handling. For time‑sensitive matters, fax and also mail a certified copy as backup.
My IRS fax failed. What should I do?
Recheck the destination number from your notice, resend as a clean PDF, and try during business hours. If busy, retry later. See the troubleshooting guide for more fixes.
Where can I find a cover sheet template for IRS faxes?
Use our free templates and include the required identifiers: name, last 4 of SSN/TIN, notice/letter number, tax year, phone, and page count.
Can I fax tax documents to state tax agencies or CPAs/lenders?
Yes. For state agencies, use the fax number on the state site or letter. For CPAs, lenders, employers, or other recipients, use their provided fax numbers. Onetime Fax sends to any valid fax number.