How to Fax to the IRS from Your Phone
Every IRS fax number organized by form type, plus step-by-step instructions for faxing W-9s, 1099s, and tax documents from your iPhone or Android.
The IRS still accepts — and often prefers — fax for document submission. If you've been asked to fax a tax form, respond to an IRS notice, or submit supporting documents, this guide covers exactly what to fax, where to fax it, and how to do it from your phone in under two minutes.
Important note on IRS fax numbers
IRS fax numbers change periodically. Always verify the number in your IRS correspondence or on the official IRS.gov website before sending. The numbers listed here were current as of 2026 but may be updated by the IRS without notice.
IRS fax numbers by form and department
The IRS publishes fax numbers for specific forms and departments. Here's the most-used list, organized so you can find what you need quickly:
Individual tax forms
| Form / Purpose | IRS Fax Number | Notes |
|---|---|---|
| Form 4506-T (Request for Transcript) | (855) 800-8105 | Used to request tax transcripts |
| Response to CP2000 Notice | Listed on your notice | Always use the number on your letter |
| Form W-7 (ITIN Application) | (855) 822-8547 | Individual Taxpayer Identification |
| Form SS-4 (EIN Application) | (855) 641-6935 | Employer ID for businesses |
| Audit / Examination documents | Listed in your exam letter | Use the number on your audit notice |
| Installment Agreement requests | (855) 232-3939 | Payment plan requests |
| Power of Attorney (Form 2848) | (855) 214-7522 | Authorize someone to represent you |
| Tax Information Authorization (8821) | (855) 214-7522 | Same office as Form 2848 |
Business tax forms
| Form / Purpose | IRS Fax Number | Notes |
|---|---|---|
| Form 1099 corrections | Per state — see IRS Pub. 1220 | State-specific fax numbers apply |
| W-9 (when faxing to IRS) | Rarely faxed to IRS directly | Usually sent to the payer, not IRS |
| Form 941 (Payroll) | Not accepted via fax | Must be mailed or e-filed |
| Penalty Abatement Request | (855) 233-8558 | First-time penalty abatement |
| Business name change | (855) 214-7522 | Write to the same office |
Step-by-step: how to fax a W-9 from your phone
Complete Form W-9 (available at IRS.gov). You can fill it in PDF form on your phone or print, sign, and photograph it.
If you have a paper form, use the AI scanner to photograph it. If you have a PDF, import it from Files or Drive.
Include your full legal name, SSN or EIN last 4 digits, and what the document is. The cover page protects the document and helps the IRS route it correctly.
Use the specific IRS fax number for what you're sending. If you received a notice, use the number printed on that notice — it routes directly to the right office.
Pay $1.99 and send. Save the delivery confirmation — it includes a timestamp and is your proof of submission if the IRS ever says they didn't receive it.
What to include on your IRS fax cover page
The IRS processes millions of documents. A proper cover page helps route your fax to the right department and protects the sensitive information on subsequent pages. Include:
- Your full legal name as it appears on your tax return
- Your Social Security Number or EIN (last 4 digits on the cover; full number inside)
- Tax year(s) the documents relate to
- Notice number if you're responding to an IRS notice (e.g., CP2000, Letter 5071C)
- Total pages including the cover page (e.g., "Page 1 of 4")
- Your callback phone number
- Date sent
Step-by-step: how to fax a 4506-T from your phone
Form 4506-T is used to request copies of your tax transcripts — often required for mortgage applications, loan processing, or legal proceedings.
- Download Form 4506-T from IRS.gov
- Fill it out completely: your name, SSN, the tax year(s) you need, and the transcript type (1=return transcript, 6=wage and income)
- Sign the form (wet signature or digital signature)
- Fax to (855) 800-8105
- Processing typically takes 5–10 business days
Tax season tip
Bookmark this page for January
IRS fax volume spikes significantly from January through April 15. If you're responding to an IRS notice during tax season, send your fax early in the day (before 10am local time) and save your delivery confirmation. Processing times can run 4–6 weeks during peak season — your confirmation timestamp is your evidence of timely submission.
What if the IRS says they didn't receive my fax?
This happens. IRS fax lines occasionally fail or documents get routed incorrectly. If the IRS claims non-receipt:
- Show your delivery confirmation with timestamp — this is critical
- Ask the IRS representative for a trace number for your case
- If necessary, resend to the same number and note "DUPLICATE — original sent on [date]" on the cover page
This is why delivery confirmation matters. A fax app that doesn't give you a timestamped receipt leaves you with no recourse if there's a dispute.
Ready to send a fax from your phone?
Download SupaFAX — available on iOS and Android. Send your first fax for $1.99. No subscription, no account required.