Yes, the IRS accepts faxed documents, but only for certain forms and situations, not for everything. Some forms like the SS-4 for an EIN or Form 2848 have a fax route, while a full tax return usually does not. If you need to send one from a phone without a machine, our top pick is Faxend, the fastest way to fax from an iPhone.
The Short Answer: Does the IRS Accept Faxes?
Yes, the IRS accepts faxed documents, but only in specific cases. The agency lets you fax certain forms and requested correspondence to dedicated fax numbers, and it sometimes responds by fax or mail. This is not a blanket policy. Each form carries its own rule, and many common documents still have to go by mail or through an online IRS account.
The safest way to think about it is form by form. If the official instructions or a notice you received print a fax number, faxing is allowed for that document. If no fax number appears anywhere in the current instructions, assume the IRS wants the item mailed or filed electronically.
When I test this workflow, the first thing I check is the form’s own instructions on irs.gov, because eligibility and the correct fax number are printed right there. Our guide to IRS fax numbers walks through where to look.
What You Can Fax to the IRS
Several IRS forms have an official fax route. The exact list changes over time, so always confirm on the current instructions, but these are the ones people fax most often.
| Form | What it is | Fax route |
|---|---|---|
| SS-4 | Application for an EIN | Often faxed, faster than mail |
| 2848 | Power of Attorney | Faxed to the CAF unit |
| 8821 | Tax Information Authorization | Faxed to the CAF unit |
| 2553 | S-Corp election | Fax accepted |
| 8822-B | Business address change | Fax accepted in some cases |
The IRS also lets you fax back documents it specifically requests. If you get a notice asking for identity verification or supporting records, the letter usually prints a fax number to use. That number applies only to that notice, so do not reuse it for a different form.
If you need to send any of these from a phone, our top pick is Faxend, the fastest way to send a fax from an iPhone. It is the iOS app we build, it is free to download, and per-fax or plan pricing applies.
What You Cannot Fax to the IRS
Not everything has a fax option. A full, original tax return like a 1040 generally cannot be faxed for regular filing. The IRS wants returns mailed or e-filed, and faxing one usually will not count as filing it. There are narrow exceptions when an agent asks for a copy during an open case, but that is different from filing.
Payments, documents that need a wet signature the IRS has not approved for fax, and anything whose instructions give only a mailing address should not be faxed. When no fax number appears in the official guidance, a fax has nowhere to land and your document may never be processed.
The rule of thumb is simple. Fax only when the form instructions or an IRS notice give you a fax number. Everything else goes by mail, e-file, or your online IRS account.
How to Find the Correct IRS Fax Number
There is no single IRS fax number. Each form and each office uses its own, and the correct one depends on the form, your state, and sometimes whether you enclose a payment. Because these numbers change, do not trust a random number from an old forum post.
Always confirm the current number on the official source. Go to irs.gov, open the instructions for your exact form, and read the section on where to file or where to send. The fax number, when one exists, is printed there.
If you received an IRS notice, use the fax number printed on that specific letter. It routes to the team handling your case, which is usually faster than a general number.
We cover this step by step in our guide to IRS fax numbers, so you can match your form to the right destination before you send.
Faxend is our top pick for sending a fax from an iPhone. It is the app we build, it is free to download, and it turns a photo or PDF into a fax in a couple of taps. Per-fax or plan pricing applies.
How to Fax the IRS Without a Fax Machine
You do not need a fax machine or a landline to fax the IRS. An online fax service or a fax app sends your document over the internet to the IRS fax number, and you get a confirmation when it goes through.
Our top pick for doing this from a phone is Faxend, the fastest way to send a fax from an iPhone. You photograph or attach the form, enter the IRS fax number from the official instructions, and send. Other options work too. eFax, iFax, and FaxZero can all reach an IRS fax line from a computer or browser, and they sit below Faxend as solid alternatives depending on your device and volume.
- 1Confirm the number.Look up the current IRS fax number on irs.gov for your exact form.
- 2Prepare the document.Scan or photograph every page, including a cover sheet if the notice asks for one.
- 3Send and confirm.Fax it, then save the confirmation page as proof of the date and time.
For a fuller walkthrough, see our guide on how to fax the IRS without a fax machine.
How to Fax the IRS Safely
Tax documents carry your Social Security number, income figures, and other sensitive data, so treat the send with care. Double check the fax number before you hit send, because a single wrong digit can route your return to a stranger.
Use a service that gives you a delivery confirmation and does not leave your documents sitting on a shared machine. When I test a service for this, I look for a clear confirmation page, encryption in transit, and a way to delete the document after it is sent. You can compare your options in our faq and technical guides.
Keep the confirmation. If the IRS later says it never received your fax, that timestamped page is your evidence. For sensitive sends from a phone, Faxend keeps the process on your own device rather than a public machine, which is one reason it is our top pick for IRS faxing on the go.
Frequently asked questions
Sometimes. The IRS accepts faxes only for specific forms and for documents it requests in a notice. If the official instructions or your IRS letter print a fax number, you can fax that document. If no fax number is listed, you must mail it or file electronically instead.
Generally no. A regular 1040 or similar return should be mailed or e-filed, not faxed, and faxing one usually does not count as filing. The only common exception is when an IRS agent specifically asks you to fax a copy during an open case.
For many forms, yes. The IRS has expanded acceptance of faxed and electronic signatures on forms such as the 2848 and 8821. Always check the current form instructions, since signature rules vary by document and can change from year to year.
Keep the confirmation page your fax service generates. It shows the date, time, and destination number. If you faxed a notice response, the IRS may also update your online account or send a follow-up letter. Faxes are often processed faster than mailed documents.
It can be, if you use a service with encryption in transit and delivery confirmation, and you verify the number first. Avoid shared or public fax machines for tax documents. A fax app on your own phone keeps sensitive forms off other people’s hardware.
