IRS Fax Numbers 2026
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What IRS Fax Numbers Do I Need?
The IRS uses different fax numbers for different forms. Use the directory below to find the correct number for your form.
| Form | Purpose | Fax Number(s) |
|---|---|---|
| SS-4 | EIN Application | 855-641-6935 |
| 2553 | S-Corp Election | 855-887-7734 (East) 855-214-7520 (West) |
| 2848 | Power of Attorney | 855-214-7519 (East) 855-214-7522 (West) |
| 8821 | Tax Info Authorization | 855-214-7519 (East) 855-214-7522 (West) |
| 4506-T | Transcript Request | 855-821-0094 855-298-1145 855-587-9604 |
| 7004 | Extension Request | 855-233-3091 |
| 14039 | Identity Theft Affidavit | 855-807-5720 |
Verify current fax numbers at IRS.gov before sending. Fax numbers may change without notice.
How Do I Fax a Form to the IRS?
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Upload your completed IRS form as a PDF. We accept documents up to 45 pages.
Enter the IRS Fax Number
Enter the correct IRS fax number from the directory above for your specific form.
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How Much Does It Cost to Fax to the IRS?
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| Service | Cost (5-page IRS form) | Monthly Fee |
|---|---|---|
| FaxItOnce | $2.75 flat | $0 |
| eFax | Included* | $16.99/month |
| UPS / FedEx Store | $5.00–$12.50 | N/A |
* eFax includes pages with a $16.99/month subscription. You pay even if you never fax again.
Can I Fax to the IRS Online?
Yes. The IRS accepts faxes from any fax machine or online fax service. FaxItOnce converts your PDF into a standard fax transmission and sends it directly to the IRS fax number you specify. The IRS cannot tell the difference between a fax sent from a physical machine and one sent online.
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If the IRS line is busy, we retry up to 4 times automatically.
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Frequently Asked Questions
What format does the IRS accept for faxed documents?
The IRS accepts standard fax transmissions. With FaxItOnce, upload your form as a PDF and we convert it to fax format automatically. PDF is the recommended format for clarity and accuracy.
How long does the IRS take to process a faxed form?
Processing times vary by form. Form SS-4 (EIN) takes about 4 business days by fax vs. 4 weeks by mail. Form 2553 (S-Corp election) takes about 60 days for acknowledgment. Always check IRS.gov for current processing times.
Do I get confirmation that my fax was delivered to the IRS?
Yes. FaxItOnce provides delivery confirmation via email when your fax is successfully transmitted to the IRS fax number. This confirms the fax was received by the IRS fax machine.
Can I fax to the IRS from my phone?
Yes. FaxItOnce works on any device with a web browser — phone, tablet, or computer. Upload your PDF, enter the IRS fax number, pay $2.75, and send.
Can I fax to the IRS from outside the United States?
Yes. FaxItOnce sends faxes to any US fax number, including IRS numbers, from anywhere in the world. You just need an internet connection.
Is it secure to fax tax documents online?
Yes. FaxItOnce uses encrypted connections to protect your documents during upload and transmission. Your files are automatically deleted from our servers after sending. Fax is also inherently more secure than email for sensitive tax documents.
How much does it cost to fax to the IRS?
FaxItOnce charges a flat $2.75 per fax to any IRS number — up to 45 pages. No per-page fees, no subscriptions. Compare that to $16.99/month for eFax or $1–$2.50 per page at a store.
What IRS forms can I fax?
You can fax any IRS form that the IRS accepts by fax, including SS-4, 2553, 2848, 8821, 4506-T, 7004, 14039, and more. Check the fax number directory on this page for specific numbers.
Do I need a cover sheet when faxing to the IRS?
The IRS does not require a cover sheet for most forms, but it is recommended. FaxItOnce includes a free professional cover sheet with every fax.
What if the IRS fax number is busy?
FaxItOnce automatically retries your fax up to 4 times if the line is busy. IRS fax lines can be busy during peak tax season, but our retry system handles this for you.
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