The IRS still requires some forms by fax
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IRS Fax Numbers
Common IRS fax numbers for tax form submissions. Copy the number, then send your form.
Form 5472 — Foreign-Owned US Entities
For foreign-owned single-member LLCs and corporations that cannot e-file
Verify on IRS.gov: IRS Form 5472 InstructionsEIN Application (SS-4) — Domestic
US-based businesses applying for an Employer Identification Number
Verify on IRS.gov: IRS Where to File — Form SS-4EIN Application (SS-4) — International
International applicants without a US address
Verify on IRS.gov: IRS Where to File — Form SS-4Taxpayer Advocate Service (Form 911)
For taxpayers experiencing significant hardship
Verify on IRS.gov: Taxpayer Advocate ServiceS-Corp Election (Form 2553) — Eastern States
Kansas City processing center. For businesses in eastern and midwestern states.
Verify on IRS.gov: IRS Form 2553 InstructionsS-Corp Election (Form 2553) — Western States
Ogden processing center. For businesses in western and central states.
Verify on IRS.gov: IRS Form 2553 InstructionsPower of Attorney (Form 2848) — Eastern States
Memphis CAF unit. For taxpayers in eastern states.
Verify on IRS.gov: IRS Form 2848 InstructionsPower of Attorney (Form 2848) — Western States
Ogden CAF unit. For taxpayers in western states.
Verify on IRS.gov: IRS Form 2848 InstructionsExtension for Info Returns (Form 8809)
Request a 30-day extension for filing 1099s, W-2s, and other information returns.
Verify on IRS.gov: IRS Form 8809 InstructionsAcquisition of Control (Form 8806)
Fax only — mail no longer accepted since July 2022. For M&A transactions.
Verify on IRS.gov: IRS Form 8806 InstructionsEach number links to the official IRS.gov page where it is published. Always confirm the current fax number on irs.gov before sending.
What if the IRS responds?
When you fax a form to the IRS, you hope it’s accepted. But if there’s a problem — a missing signature, a wrong form version, additional information needed — the IRS may fax back. Without your own number, that response goes nowhere.
Without a dedicated number
- •Fax sent from a shared number
- •If the IRS faxes back, the reply can’t reach you
- •A rejection notice could go unnoticed for weeks
- •Missed deadlines, penalties, or having to refile
With your own number
- Fax sent from your dedicated number
- IRS responses arrive in your email as PDFs
- Instant notification when a reply arrives
- $4.99/month — less than the cost of one certified letter
How to fax to the IRS
Upload your form
Upload a PDF, Word document, or scan with your phone camera. Preview every page before sending.
Enter the IRS fax number
Copy the number from the directory above, or enter it manually. We'll confirm it before sending.
Send and track
Hit send. Get real-time delivery status and an email confirmation when the IRS receives your fax.
What it costs
Most IRS forms are under 10 pages — send them free. Longer documents like amended returns or Form 5472 with attachments may need a credit pack.
IRS Form Guides
Step-by-step fax instructions for every common IRS form — fax numbers, deadlines, and tips from official sources.
Common Questions
Can I really fax to the IRS for free?
Yes. FaxTerra gives you 10 free pages per month — enough for most IRS forms. If your document is longer, credit packs start at $1.99 for 10 pages. No subscription required just to send.
How long does the IRS take to process a faxed form?
It varies by form. Faxed EIN applications (SS-4) are typically processed within 4 business days — much faster than the 4-6 weeks by mail. Form 5472 and amended returns depend on IRS workload but are generally faster than mailed submissions.
Will the IRS know my fax came from an online service?
Your fax arrives at the IRS exactly as you sent it — clean, with no ads or branding. If you subscribe, your dedicated fax number appears as the sender. The IRS sees a normal fax, indistinguishable from one sent by a fax machine.
What if the IRS needs to fax something back to me?
Without a dedicated number, faxes are sent from a shared number — if the IRS responds, the reply has nowhere to go. With a FaxTerra subscription ($4.99/month), your faxes go out from your own number. If the IRS faxes back a rejection notice, a request for more information, or a confirmation, it arrives in your email inbox.
Which IRS forms can I fax?
The IRS accepts many forms by fax, including Form SS-4 (EIN application), Form 5472, Form 2848 (Power of Attorney), Form 8821 (Tax Information Authorization), Form 1040-X (Amended Return), and Form 911 (Taxpayer Advocate). Each has a specific fax number — see the directory above.
I need to fax Form 5472. Can I e-file it instead?
No. Form 5472 for foreign-owned single-member LLCs cannot be e-filed — the IRS requires it by mail or fax. Faxing is significantly faster and gives you a delivery confirmation. The fax number for Form 5472 is (855) 887-7737.
Is it secure to fax tax documents online?
Yes. FaxTerra uses TLS 1.3 encryption in transit and AES-256 encryption at rest. Your documents are never shared with third parties. This is the same level of encryption used by banks and healthcare providers.
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