🍁 How to Fax the Canada Revenue Agency
The Canada Revenue Agency does not publish one general fax number. For a benefit or credit review, the CRA lets you fax your documents to the number provided in the letter it sent you, or you can upload them through Submit documents online. Charities can no longer fax at all, since the Charities Directorate stopped receiving faxed documents on April 1, 2026. To fax, select Canada, type the 10-digit number from your letter, and up to 3 pages costs $2.99.
📋 In This Guide
- Use Only the Fax Number in Your CRA Letter
- Submit Documents Online Instead of Faxing
- Charities: The CRA No Longer Accepts Faxes
- Non-Resident Representatives: Form AUT-01 to Sudbury
- Entering a Canadian Fax Number
- What to Put on the Cover Page and Each Page
- Deadline, Cost, Your Record and Failed Faxes
- Frequently Asked Questions
Use Only the Fax Number in Your CRA Letter
The CRA does not publish a single fax number for all of its work. Each review or request letter tells you how to reply, and for benefit and credit reviews the CRA says you may send your documents by fax to the number provided in the letter, by mail to the address provided in the letter, or electronically through Submit documents online. Different letters can carry different numbers, so a number from an old letter or from a search result may reach the wrong team.
Before you send anything, find the fax number printed in the letter you are answering, and find the reference number, which the CRA places in the upper right corner of its letters. If your letter gives no fax number, do not guess one. Use Submit documents online or mail, as the letter describes.
The rule: fax the CRA only at the number printed in the letter you are answering, and put that letter's reference number on every page you send.
Submit Documents Online Instead of Faxing
If you have a CRA My Account, Submit documents online is the CRA's own electronic route. You enter the reference number from your letter, and you can upload up to 10 files in one session, up to 150MB in total. The CRA accepts common types such as PDF, Word, Excel, JPG and TIFF files there.
Faxing is the better choice when you cannot sign in to My Account, when you are helping someone else, or when you simply want to send the pages today from wherever you are. The CRA page on tax return reviews also suggests mail or fax when you have a large number of receipts. Whichever route you choose, use only one, so the officer does not receive the same documents twice.
Charities: The CRA No Longer Accepts Faxes
If you are writing to the CRA for a registered charity, do not fax. The CRA says that as of April 1, 2026, it is no longer receiving faxed documents, and the Charities Directorate fax line is no longer in service. Charities now send documents through the online CRA account. For help, the CRA lists 1-800-267-2384, where you ask for the Digital Concierge, Monday to Friday from 8 am to 5 pm Eastern Time.
Non-Resident Representatives: Form AUT-01 to Sudbury
One CRA fax number is published for a specific purpose. To authorize a representative for a non-resident account, the CRA uses Form AUT-01, which gives offline access only. You can fax the completed form to the Sudbury Tax Centre at 1-705-671-4559, or mail it to Sudbury Tax Centre, PO Box 20000, Station A, Sudbury ON P3A 5C1. The CRA asks that you send it within six months of the date it was signed.
To fax it, select Canada and type 7056714559. Use this number only for Form AUT-01 and not for review documents or other letters.
Entering a Canadian Fax Number
Canada uses the same +1 country code as the United States. Select Canada and type all 10 digits: the 3-digit area code and the 7-digit number. Do not type the leading 1, because +1 is added for you, and the box removes a 1 if you type one. Leave out spaces, dashes and brackets. The pay button turns on only when exactly 10 digits are in the box.
This works the same whether you are sending from the United States or from inside Canada, because the site runs in any browser. A fax to a Canadian number is priced like a US fax. For faxing other Canadian offices, see how to fax to Canada online, and for immigration offices, see faxing IRCC.
What to Put on the Cover Page and Each Page
A CRA office receives many faxes for many files, so a clear cover page helps your documents reach the officer handling your review. On the cover page, write "Canada Revenue Agency" and the program or team named in your letter, your full name as the CRA has it, your phone number, the reference number from the upper right corner of the letter, a short list of what is attached, and the total page count. Add your social insurance number only where the letter or form asks for it.
On every other page, write your name and the letter's reference number in the margin, and number the pages, for example "Page 4 of 8". Put a copy of the CRA letter right after the cover page, then the documents in the order the letter asks for them. Make sure receipts and small print are sharp, because a faxed copy is a little less clear than the original.
Deadline, Cost, Your Record and Failed Faxes
Your deadline is the date in your CRA letter. For benefit and credit reviews, the CRA says it aims to reply no later than 45 days after it receives your documents, and if you need more time to gather them, the CRA lists 1-800-387-1193 to call. Faxing helps when time is short, because delivery usually takes a few minutes.
A fax to a Canadian number costs $2.99 for up to 3 pages, and each extra page is $0.99. A cover page, the CRA letter and four receipts make 6 pages, which is $2.99 + 3 x $0.99 = $5.96; 8 pages is $7.94. There is no account, and nothing is printed on your document.
After delivery you get a confirmation email with the destination number, the page count and the time it went through, in US Eastern Time. Keep it with your copy of the letter, because it is your record of exactly when it was sent. If the fax cannot be delivered, the full amount goes back to your card automatically, and you can check the number against the letter and send again. If an officer offers to fax something back, our sister service GetAFax.com gives you a private US fax number for 24 hours for $5, with each fax arriving in your email as a PDF; ask the officer first whether they can send to a US number. For US tax offices, see how to fax the IRS and our US fax guide.
Why send it here
One price for the whole fax, shown before you pay, and nothing added at checkout.
Nothing is printed on your document. It arrives exactly as you uploaded it.
If it cannot be delivered, the money goes back to your card without you asking.
It works from anywhere in the US, in any browser, with no account.
Frequently Asked Questions
How much does it cost to fax documents to the Canada Revenue Agency?
Do I need an account to fax my CRA review documents?
What is the general fax number for the Canada Revenue Agency?
CRA sent me a letter asking for receipts for my Canada child benefit, can I fax them?
Where is the reference number on a CRA letter?
Should I fax the CRA or use Submit documents online?
I'm a US resident and the CRA wants documents for my Canadian return, can I fax from the US?
Can a charity fax documents to the CRA Charities Directorate?
What is the CRA fax number for Form AUT-01 for a non-resident account?
How do I type the CRA fax number from my letter?
How do I enter the CRA Sudbury fax number 1-705-671-4559?
Will the CRA fax me back after I send my documents?
How do I show the CRA I faxed my documents on time?
What should I do if my fax to the CRA fails?
Is it safe to fax my tax documents to the CRA?
How long does the CRA take to reply after I fax my benefit review documents?
I need more time to get documents for my CRA benefit review, who do I call?
What should my cover page say when I fax the CRA?
I sent my CRA documents online already, should I fax them too?
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