How to Fax Documents to the IRS from Your iPhone
You can fax documents to the IRS directly from your iPhone, no fax machine required.
An online fax app like Faxend lets you attach a PDF or photo of your tax document, enter the IRS fax number, and send it in under a minute.
Faxley
Faxend Editorial · Updated April 17, 2026
Why the IRS still uses fax
The IRS accepts fax for a surprisingly wide range of situations. These include responding to audit notices, submitting Form 2848 (Power of Attorney), sending identity verification documents, and replying to CP2000 underreporter notices.
Email is not an accepted channel for sensitive tax documents. The IRS treats fax as a secure, time-stamped delivery method. That matters when you're responding to a deadline.
According to IRS guidance on records requests, fax is explicitly listed as an approved way to respond to many notices. So the fax machine is not going away any time soon.
IRS fax numbers you need
The IRS does not publish a single universal fax number. Each department and notice type has its own number. Always use the fax number printed on the specific notice or letter you received.
That said, a few commonly referenced numbers are worth knowing. The Taxpayer Advocate Service can be reached by fax at numbers listed on the IRS Taxpayer Advocate page. For Form 2848 submissions, the fax number depends on your state. The IRS provides a full table in the Form 2848 instructions.
One important note: never fax sensitive documents to a number you found on a random website. Verify every number at irs.gov or on the official notice you received. Tax scams do target fax numbers.
Once you have the correct number, you're ready to send. The process takes about two minutes on your iPhone.
What you need before you start
You need three things. First, the correct IRS fax number from your notice or from irs.gov. Second, a clear copy of the document you're sending, either a PDF or a well-lit photo. Third, a way to send the fax from your phone.
For the fax itself, you have two good options on iPhone. You can use the Faxend iPhone app or the web version at faxend.com/send. Both work without a fax machine or a dedicated phone line.
If your document is a physical paper, scan it with your iPhone's built-in Notes app or the Files app. Tap the camera icon in Notes, choose "Scan Documents," and save it as a PDF. That PDF is ready to attach directly to your fax.
Check that your document is legible before sending. IRS staff will reject or delay processing if a fax is too dark, too light, or cut off at the edges. A quick preview in the Faxend app shows you exactly what the recipient will see.
How to fax the IRS from your iPhone
Get the Faxend app from the App Store or open faxend.com/send in Safari. No account is required for a one-time send on the Basic plan.
Type the fax number exactly as shown on your IRS notice. Include the area code. Do not add dashes or spaces in a way the app doesn't expect. US numbers are typically 10 digits.
Tap the attachment icon and choose your PDF from Files, or select a photo from your Camera Roll. Faxend accepts PDF, JPG, PNG, and Word files. The app converts everything to fax-ready format automatically.
A cover page helps IRS staff route your fax correctly. Include your name, taxpayer ID or Social Security Number (last four digits only is fine), the notice number you're responding to, and the date. Faxend lets you add a cover page note before sending.
Preview your fax. Check that every page is included and readable. Tap Send. Faxend typically delivers a single-page fax within 30 to 60 seconds. You'll get a confirmation once it's delivered.
Screenshot or save the delivery confirmation. The IRS can take days or weeks to update their records. Your confirmation is proof the document was sent on a specific date and time. Keep it with your tax records.
Ready to send your fax?
Upload your document, enter the number, and hit send. No subscription required for your first fax.
Tips for a successful IRS fax
Send during off-peak hours if possible. IRS fax lines can be busy during filing season, especially in February, March, and April. Early morning or evening sends tend to go through faster.
Keep your fax under 15 pages when you can. Longer transmissions have a higher chance of being cut off if the IRS line drops. If you need to send a large packet, split it into logical sections and fax each one separately, noting "Part 1 of 2" on each cover page.
Always respond by the deadline on your notice. Faxing on the due date is acceptable, but cutting it close is risky. Send at least a day early. If you miss a deadline, call the IRS number on your notice immediately to explain.
Double-check the fax number every single time. The IRS reassigns some numbers periodically. A number that worked last year may route to the wrong department today. Always verify at irs.gov or on your current notice.
For more general guidance on sending faxes from an iPhone, the post how to send a fax from iPhone covers the full process in detail.
Security and compliance
Tax documents contain some of the most sensitive personal data you own. Social Security Numbers, income figures, and bank account details all appear on common IRS forms. You need to know your fax service handles that data responsibly.
Faxend uses AES-256 encryption for documents both in transit and at rest. That's the same encryption standard used by financial institutions. Your document is not stored on Faxend's servers longer than necessary, and it is never shared with third parties.
Faxend is HIPAA-ready on every plan, including the $2.99 Basic plan. While HIPAA is primarily a healthcare regulation, its data-handling standards are a useful benchmark for any sensitive document. A Business Associate Agreement is available for Standard and Pro subscribers who need it in writing.
If you regularly fax the IRS or other government agencies, the Standard plan at $9.99 per month adds fax history so you always have a record of what you sent and when. The Pro plan at $19.99 per month includes a dedicated inbound fax number, which is useful if you need the IRS to fax documents back to you.
For a broader look at iPhone fax apps and how they compare on security and features, see the best fax apps for iPhone roundup.
If you prefer not to pay a monthly subscription for occasional IRS faxes, the no-subscription fax options for iPhone post explains your choices, including Faxend's one-time Basic plan.
Frequently asked questions
Can I really fax the IRS from my iPhone?
Yes. The IRS accepts faxes for many document types, including audit responses, Form 2848, and identity verification. An online fax app like Faxend lets you send directly from your iPhone without a fax machine or phone line.
Where do I find the correct IRS fax number?
Always use the fax number printed on the specific IRS notice or letter you received. You can also find department-specific numbers at irs.gov. Never use a fax number from an unofficial third-party website.
Does faxing the IRS count as timely filing?
For most notice responses, yes. The IRS generally treats the fax transmission date as the response date. Save your delivery confirmation as proof. For tax returns themselves, fax is not accepted; you must mail or e-file.
What file formats can I fax to the IRS through Faxend?
Faxend accepts PDF, JPG, PNG, and Word documents. PDF is the most reliable format for tax documents because it preserves formatting exactly. If your document is a photo, Faxend converts it automatically before sending.
Is it safe to fax my Social Security Number through Faxend?
Faxend uses AES-256 encryption in transit and at rest, which is a strong standard for protecting sensitive data. The service is HIPAA-ready on all plans. That said, only include personal identifiers when the IRS specifically requires them.
What if the IRS fax line is busy?
IRS fax lines can get congested during filing season. If your send fails, Faxend will notify you. Try again during off-peak hours such as early morning or late evening. If you are close to a deadline, call the IRS number on your notice as a backup.
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