Common IRS Forms That Accept Fax
Not everything can be faxed to the IRS, but several important forms and documents can — and often should, when time is critical.
Form 4506-T — Request for Transcript of Tax Return
This is the most commonly faxed IRS form. Mortgage lenders, student loan servicers, and financial institutions routinely ask you to submit a 4506-T to verify your income. The IRS processes faxed 4506-T requests faster than mailed ones.
Fax numbers by region (RAIVS units):
| Region | States | Fax Number |
|---|---|---|
| Southern | FL, LA, MS, TX and surrounding states | 855-587-9604 |
| Western | CA, CO, AZ, WA, OR and surrounding states | 855-298-1145 |
| Central | NY, IL, GA, NC, OH and surrounding states | 855-821-0094 |
Form 2848 — Power of Attorney and Declaration of Representative
Required when you authorize a tax professional (CPA, enrolled agent, attorney) to represent you before the IRS. Faxing is the fastest way to get your representative authorized.
Fax number: 855-214-7522 (CAF Unit — Centralized Authorization File)
For foreign addresses: 304-707-9785
Form 8821 — Tax Information Authorization
Similar to Form 2848, but allows a third party to view your tax information without representing you. Commonly used by financial planners and mortgage processors.
Fax number: 855-214-7522 (same CAF Unit as Form 2848)
Form SS-4 — Application for Employer Identification Number (EIN)
International applicants who cannot apply online can fax Form SS-4 to obtain an EIN.
Fax number: 855-215-1627 (domestic) or 304-707-9471 (international)
Other Faxable Documents
- Form 8822/8822-B (Change of Address) — Fax to the service center listed in the form instructions
- CP notice responses — Use the fax number printed on the notice itself
- Audit documentation — Use the fax number provided by your assigned IRS examiner
- Form 14039 (Identity Theft Affidavit) — Fax to the number on the IRS letter you received
- Extension requests — Form 4868 for individuals, Form 7004 for businesses
Important: Always verify fax numbers against the current instructions on IRS.gov. The IRS reorganizes frequently and numbers change. The numbers listed above were accurate as of early 2026.
What You CANNOT Fax to the IRS
- Form 1040 (individual tax return) — Must be e-filed or mailed. The IRS does not accept tax returns by fax.
- Form 1120/1065 (corporate/partnership returns) — Same rule. E-file or mail only.
- Amended returns (Form 1040-X) — E-file (now supported) or mail.
- Payment — You cannot fax a check. Use IRS Direct Pay, EFTPS, or mail a check.
If an IRS agent specifically requests a document by fax, that overrides the general rules — follow their instructions.
Step-by-Step: Fax a Document to the IRS with FaxChat
You don't need a fax machine. Here's how to fax the IRS from your computer or phone in under 5 minutes.
1. Prepare Your Form
Download the form from IRS.gov, fill it out, and save as PDF. If the form requires a signature, print it, sign it, and scan it back to PDF. Use 300 DPI or higher for signed documents.
Combine everything into a single PDF in this order:
- Cover sheet (with your name, last 4 of SSN/EIN, form number, page count)
- The completed, signed form
- Any supporting documents
2. Verify the Fax Number
Do not trust the number from a random blog post — including this one. Numbers change. Check:
- The current form instructions PDF on IRS.gov
- The IRS notice you received (if responding to one)
- Your IRS agent directly (if assigned one)
3. Send via FaxChat
- Go to faxchat.app/en/send
- Upload your combined PDF
- Enter the IRS fax number with country code: +1 followed by the number (e.g., +1 855-214-7522)
- Review the price and page count
- Pay with credit or debit card via Stripe
- Wait for delivery confirmation — save this confirmation
No account needed. No subscription. Pay only for the fax you're sending.
4. Save Your Confirmation
FaxChat provides a delivery confirmation with timestamp and status. Save this. If the IRS later says they never received your documents, this confirmation is your proof of timely submission. For forms with filing deadlines, this matters.
Tips for Faxing the IRS Successfully
Send during business hours (Eastern Time)
IRS fax lines are most reliable during business hours: Monday through Friday, 7:00 AM to 7:00 PM ET. Faxing outside these hours may result in busy signals or failed transmissions, especially during tax season (January through April).
Keep your confirmation indefinitely
The IRS statute of limitations for most tax matters is 3 years. Keep your fax confirmation at least that long. A PDF saved to cloud storage costs nothing and could save you from a penalty dispute.
Use a cover sheet — always
The IRS processes millions of faxes. Without a cover sheet identifying the taxpayer and form, your fax may sit in an unrouted queue. Include:
- Taxpayer name
- Last 4 digits of SSN or full EIN
- Form number or IRS notice number
- Total page count
- Your phone number or your representative's number
IRS processing times after fax receipt
- Form 4506-T: 5-10 business days for transcript delivery
- Form 2848/8821: 3-5 business days for CAF registration (faster than the 4-6 weeks by mail)
- CP notice responses: 30-60 days for case resolution
- Form SS-4 (EIN): 4 business days by fax vs. immediate online
If your fax fails
IRS fax lines can be busy, especially during peak season. If you get a "busy" or "no answer" result:
- Wait 15-30 minutes and try again
- Try during off-peak hours (early morning or after 4 PM ET)
- If it fails repeatedly, the fax line may be temporarily down — try the next business day
FaxChat automatically retries failed transmissions, so in many cases a busy line resolves itself.
Send and track IRS faxes from your browser
FaxChat Pro gives you a dedicated US number and a chat-style inbox for $9.99/month. Send, receive, and schedule — all threaded by contact with delivery confirmations. Or send a single fax for $0.99, no signup required.
Start with FaxChat →Frequently Asked Questions
How much does it cost to fax to the IRS with FaxChat? $0.99 base fee plus $0.25 per page. A typical 3-page IRS form with cover sheet costs $1.74 (cover sheet is free). No subscription or account required.
Can I fax to the IRS from outside the United States? Yes. The IRS fax numbers are standard US phone numbers. FaxChat sends to US fax numbers from anywhere in the world at the same price.
Is faxing the IRS secure? Fax transmission is point-to-point over the telephone network. It is not stored on intermediary servers the way email is. The IRS itself considers fax an acceptable secure channel for sensitive tax documents.
Should I fax or mail my IRS documents? Fax when speed matters — audit deadlines, representation authorizations, transcript requests. The IRS logs faxes the same day, while mail can take 1-2 weeks to be processed. For tax returns, you must e-file or mail (fax is not accepted).