How to find the right IRS fax number

There's no single IRS fax number, because each form, notice and IRS office has its own. Use the number printed on your IRS notice or letter, or, for a form you're sending on your own, the one in that form's instructions on IRS.gov.

For many forms the number also depends on your state. We copied each number below from the IRS.gov page named next to it on November 1, 2026. The IRS says the numbers can change without notice, so check that page again on the day you send.

Where to find the fax number for your form or letter

Look in these places, in this order, and use the first fax number you find.

1. The IRS notice or letter If the IRS wrote and asked for something by fax, use the number in that letter. That goes even for a form with a fax number of its own. Form 14039 lists 855-807-5720, for example, but the IRS says to use the fax number on your notice if you're answering one.
2. The instructions for your form On IRS.gov, open the instructions for the form and look for a Where To File chart or an "Apply by fax" section. The charts for Forms 2848, 8821 and 2553 give a fax number for each group of states.
3. The form's About page The instructions for Forms 2848 and 8821 send you to the form's page, such as IRS.gov/Form2848, for changes under "Recent Developments". Some of these About pages, like the one for Form 3911, carry the fax numbers themselves.

If none of them gives a fax number, don't borrow one from another form. Mail it, or use the online option its instructions name.

Fax numbers for common IRS forms, checked November 1, 2026

Where the number depends on your state, the full list is further down.

Form SS-4 and your EIN

The IRS calls this fax service Fax-TIN. It takes faxes 24 hours a day, 7 days a week, and the IRS says you'll generally get your EIN back by fax within 4 business days. It faxes the EIN back to the number you give on the form, so put yours on it.

If you're in the United States or a U.S. territory, the IRS recommends applying online instead, where you get the EIN and can use it immediately.

If you don't have a fax number to get the EIN back on, you can get one on faxfair.com, from $4.99 for 7 days as of November 2026. Pick a length that outlasts the IRS's 4 business days. We email faxes sent to it to you as a PDF. If you also send the form from faxfair.com, use "Send a fax from this number" on the inbox page. Once the number is active, the fax goes out from it. It shows at the top of each page, and on the cover sheet's Fax line if you add one.

Forms 2848 and 8821 by state

From the Where To File Chart in the instructions for Form 2848 and for Form 8821. Both charts give the same numbers. The IRS generally records powers of attorney on its CAF system, and the third row goes to its International CAF Team.

Form 2553 by state

From the instructions for Form 2553 and the IRS page on where to file it. Use the state where the corporation's principal business, office or agency is. If you fax the form, keep the original with the corporation's permanent records.

Form 3911 by state

From the IRS page About Form 3911. The IRS calls this list its fax numbers but doesn't label each number, and it says to send nothing but Form 3911 to them.

Form 4506-T by state

From Form 4506-T, page 2. IRS.gov puts each number under the heading "Mail or fax to", without a "Fax" label. Use the state you lived in, or your business was in, when that return was filed.

The IRS must receive Form 4506-T within 120 days of the date you signed it, or it rejects the form. Don't count on getting the transcript back by fax, since in June 2019 the IRS announced it would stop faxing transcripts to taxpayers and third parties. The form points you to Get Transcript on IRS.gov for faster service.

CP2000 notice replies

From the IRS page Understanding your CP2000 series notice. Pick the location printed at the top left of your notice.

The same IRS page calls its online document upload tool the fastest way to send your reply.

Limits on faxing the IRS

• A typed or electronic signature on Form 2848 or 8821. A faxed copy needs a handwritten signature. If you signed electronically, submit it online at IRS.gov/Submit2848 or IRS.gov/Submit8821.
• A tax return. We found no fax number for one. The IRS page on where to file paper returns lists mailing addresses only, as of November 2026. E-file or mail your return, unless an IRS letter gives you a fax number for it.
• The wrong form on a number. The SS-4 numbers take EIN applications only, and the Form 3911 numbers take Form 3911 only. The Form 8886 number isn't for general use, and it takes one Form 8886 per fax, up to 100 pages.
• Form 4506-C. The form says an authorized IVES participant faxes it to the IRS with an approved IVES cover sheet, so we've left its IVES fax numbers out of our table.
• The same form sent two ways. Form 14039 asks you to choose online, mail or fax, not all of them. The IRS page for Forms 2848 and 8821 says not to submit a form online if you already faxed or mailed it.

What to put on the cover sheet

On its page about faxing Form 8886, the IRS lists what the cover sheet should say. Using the same list for other IRS faxes is our suggestion, not an IRS rule.

• A subject that names the form, such as "Form 2848"
• Your name, title, phone number and address
• The taxpayer's name
• The date
• The number of pages, counting the cover sheet

If you're answering a letter, we'd add its notice or letter number to the subject. Leave your Social Security number and EIN off the cover sheet, as the IRS asks on that page, since they belong on the form itself. For Form 14039, the IRS also asks you to mark the cover sheet "Confidential".

You can fill in a free IRS fax cover sheet online or download one. Nothing you type is sent to us or anyone else, and nothing is saved.

Once you have the number, you can fax your IRS form from this website. Upload the PDFs, type the fax number and add a free cover sheet. As of November 2026, a fax of up to 40 pages costs $2.49, and we only charge your card when the fax is delivered. If it fails, we cancel the payment and you aren't charged. For forms still on paper, the FaxFair iPhone app scans them with the camera.

Send a fax online

Keep proof the fax went through

On its Form 8886 page, the IRS says it won't send a confirmation or receipt for those faxes. It asks you to check your fax transmission log to see that every page went through, and to keep a copy as your receipt. We'd do the same for any IRS fax, and keep the log with a copy of exactly what you sent.

Our guide to how long it takes to send a fax shows what a transmission report lists and how to set a machine to print one after every fax.

If you send from faxfair.com, a private status page shows the fax's progress until it's delivered or fails. Once it says delivered, take a screenshot or print the page, and keep it with the receipt Stripe emails you for the payment. That page shows our delivery status, not a receipt from the IRS.

The IRS's CP2000 page asks you to understand an online fax service's privacy and security policies before you use one. We delete your files from our servers when the fax is delivered or fails, and our privacy policy lists the basic details we keep for 90 days.

If you'd rather use a fax machine at a store or library, see where you can fax something near you, and ask for the confirmation page before you leave.

Our guide on how to fax without a fax machine compares a fax website, a phone app, a store and a library.

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