Guides
Short, specific answers for the faxes people actually have to send.
Fax number lookup: how to find a fax number
Fax number lookup that works - where to find an office's fax number, a free official lookup for doctors, and how to check a number before you send.
Free fax online: what's really free in 2026
Free fax online services compared - page limits, daily limits, branding and what you give them - plus the free first page in HonestFax.
Online fax service: how it works and what it costs
What an online fax service is, how sending and receiving work without a fax machine, monthly plan vs pay per fax, and how to pick one.
Windows Fax and Scan: how it works, and faxing without a modem
Windows Fax and Scan sends faxes only through a fax modem or fax server. How to turn it on in Windows 11, what it needs, and how to fax without a modem.
How to fax from a computer - free and paid ways
How to fax from a computer, Windows or Mac: a free fax website, an online fax service, Windows Fax and Scan, or your phone - with what each one needs.
How to get a fax number (and can you get one for free?)
What a fax number is, why your cell number can't be one, and how to get your own from your iPhone - for one week, for good, or free.
Fax to IRS not going through? What to check, step by step
Your fax to the IRS keeps failing or says busy? Check the number for your form and state, the signature, the format and the timing - with the official numbers.
How to fax from iPhone for free - and what free really means
How to send a fax from your iPhone for free - a free first page in a fax app, a free fax website or a free online fax plan - and the trial trap to avoid.
Is a fax received immediately? How long a fax takes
A fax arrives while it is being sent, usually in a minute or two. What slows it down, how retries work, and why "received" isn't the same as "processed".
Can you send a fax by email? How email to fax works
How email to fax and fax to email work, what you need for them, and the faster way to fax an email attachment straight from your iPhone.
How to fax Form 2848 (power of attorney) to the IRS
Where to fax IRS Form 2848, the signature and line 3 mistakes that get it sent back, and how to send it from your iPhone. Checked against the IRS instructions.
How to fax Form 8821 (tax information authorization) to the IRS
Where to fax IRS Form 8821, how it differs from Form 2848, the 120-day rule, and how to send it from your iPhone. Checked against the IRS instructions.
How much does it cost to send a fax?
What a fax really costs in 2026 - at a print or shipping store, on a free or paid fax website, with a monthly online fax plan, or with a phone app. Prices checked at the source.
How to confirm a fax was received
What a fax confirmation really proves, what "delivered" means, how to get proof you sent the right pages, and what to do when the office says they never got it.
How to receive a fax on iPhone
An iPhone has no fax number of its own. Here is how to get one, how incoming faxes arrive, and how to receive a fax just once without signing up for a subscription.
How to cancel a fax app subscription on iPhone (and ask for a refund)
Stop a weekly or monthly fax app subscription from your iPhone settings in four taps, and request a refund from Apple if you were charged.
How to fax a PDF from your iPhone
Fax a PDF from Files, iCloud Drive or an email attachment, combine several PDFs into one fax, and get the page order right.
What to put on a fax cover sheet (with a free template)
The six things every fax cover sheet needs, an example you can copy, and a free cover sheet maker that downloads a PDF.
How to fax Form SS-4 to the IRS from your phone
The official SS-4 fax numbers, what to put on the cover sheet, and when your EIN comes back by fax.
FAX from iPhone review: what the weekly plan really costs
An honest look at the most popular fax app on the App Store, its subscription pricing, and when it is the right choice.
How to send a fax without a fax machine
Four ways to send a fax with no machine and no landline, from your phone, a computer, a print shop or a library, and when each makes sense.
How to send a fax from your iPhone, step by step
Scan or attach your pages, check the price, send, and confirm delivery. The whole process from an iPhone, no fax machine needed.
IRS fax numbers by form (SS-4, 2848, 8821)
The official IRS fax numbers for Form SS-4, Form 2848 and Form 8821, by state, checked against irs.gov.
How to scan a document with your iPhone so it faxes clearly
Lighting, background, angle and page order. Simple habits that keep a faxed page readable on the other end.
How to send an international fax from your iPhone
Dialing formats for faxing Canada, the UK, Germany and Japan from an iPhone, including the leading zero that trips most people up.
Why a fax fails, and how to fix it
Busy lines, no answer, a number that isn't a fax line, and pages that come out unreadable. What each failure means and what to do next.
Sending medical forms to a doctor's office by fax
How to get a referral, records request or insurance form to a clinic by fax from your phone, and how to be sure it arrived.