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The Sudbury Tax Centre is a CRA processing site at 1050 Notre Dame Avenue, Sudbury ON P3A 5C2. Paper returns from several Ontario areas, the Atlantic provinces and Nunavut are mailed there, but you can’t walk in and speak to anyone. The table below shows who sends paper there and which address to use.
Sudbury tax centre: quick answers on who sends what
The Sudbury Tax Centre is a CRA mail and fax processing site at 1050 Notre Dame Avenue, Sudbury ON P3A 5C2. You post paper there, and you can't visit in person because the CRA says there is no walk-in service. Use the table to see whether your paper goes there.
| Your situation | Sudbury tax centre? |
|---|---|
| Paper T1 from New Brunswick, Newfoundland and Labrador, Nova Scotia, Nunavut or Prince Edward Island | Yes |
| Paper T1 from Barrie, Belleville, Kingston, Ottawa, Peterborough, St. Catharines, Sudbury or Toronto | Yes |
| Paper T1 from Montréal, Outaouais or Sherbrooke | Yes |
| Paper T1 from another part of Ontario | Check the CRA page for your address first |
| Return filed by a non-resident corporation | Yes, it is assessed there |
| Section 216 return | Sudbury or Winnipeg, depending on the country of residence |
| Walking in with a question or receipt | No, call the CRA instead |
Once you know it's Sudbury, use the 5C2 address for your return and the 5C1 post office box for other mail, and send it tracked. Fax numbers are 705-671-3994 and 1-855-276-1529.
What is the Sudbury Tax Centre?
It’s one of four tax centres on the Canada Revenue Agency’s list. The others are Jonquière, Prince Edward Island and Winnipeg. A tax centre handles paper: returns, forms, letters and payments that arrive by mail or fax. It isn’t a counter where you queue with a receipt in your hand, and the CRA says so on its own contact page, which states there is no walk-in service at these locations.
That surprises people who search for “CRA Sudbury office” and expect opening hours. The city name goes on your envelope and that’s the extent of it. Need to talk to a person? Call the CRA. Need to send paper? Write to Sudbury.
Who mails their paper return to Sudbury?
The CRA sorts paper T1 returns by where you live. According to its page on where to mail a T1, the Sudbury Tax Centre takes returns from New Brunswick, Newfoundland and Labrador, Nova Scotia, Nunavut and Prince Edward Island. Some areas of Ontario are included too: Barrie, Belleville, Kingston, Ottawa, Peterborough, St. Catharines, Sudbury and Toronto. So are Montréal, Outaouais and Sherbrooke in Quebec.
Live somewhere else in Ontario? Then don’t assume. Check the page against your own address before you buy a stamp, because a return sent to the wrong centre just loses time. If you can file electronically, our page on NETFILE explains how, and the list of CRA office locations shows why no counter visit is possible.
Which address and fax number do you use?
Two addresses exist. Most people grab the wrong one.
| What you’re sending | Where it goes |
|---|---|
| Income tax and benefit returns | Sudbury Tax Centre, 1050 Notre Dame Avenue, Sudbury ON P3A 5C2 |
| Everything else | Post Office Box 20000, Station A, Sudbury ON P3A 5C1 |
| Fax | 705-671-3994 or 1-855-276-1529 |
Compare the postal codes. The return address ends in 5C2, the post office box in 5C1. A return addressed to the box will cost you time.
What should you check before sealing the envelope?
A two-minute pass catches most of the grief. Run through it with the return on the table.
- Is every page of the return there, and is it filled in and signed where the form asks?
- Are the slips the form tells you to attach actually attached? Receipts and the rest stay at home.
- Does the address say 5C2 and not 5C1?
- Have you photocopied the whole thing, or taken clear photos?
Then send it with tracking. A few extra dollars at the counter buys you proof of the day it went out.
Should you mail a return at all?
Mostly no. Filing online is faster, and you see errors before you submit. Paper makes sense if you prefer it, or if you have a form that can’t be filed electronically. Before you print anything, run your numbers once so you know what to expect. Say your taxable income is $60,000 in Ontario. Our income tax calculator shows $6,192.73 of federal tax and $3,224.52 of Ontario tax. That’s before CPP and EI credits, so your real bill will be a little lower.
If you’re owed money, the tax refund calculator gives a rough figure. Compare it with what your return says, and look into any big gap. For people who owe tax during the year, the tax instalments calculator splits the amount into payments.
Is fax a good way to send things?
It’s on the CRA’s list, so it’s allowed for correspondence, and the two numbers in the table are the ones shown. Faxing a return you’re sending for the first time isn’t what most people do, though, and a fuzzy fax of a signature page isn’t doing you any favours. Keep the confirmation sheet your machine prints, and if the page is something personal, think about whether the fax machine at your local print shop is a place you want it sitting.
What else lands in Sudbury?
The centre isn’t only for individuals. The CRA says it assesses and reassesses returns filed by non-resident corporations. Section 216 returns go to Sudbury or Winnipeg, depending on the country where the person lives. Non-resident GST/HST enquiries also have their own Sudbury page. If any of that describes you, start on the CRA page for your case, not on ours.
Common mistakes with paper mail
Most problems are small. People send the return to the box address. Others mail it to the wrong centre, or attach every receipt they own when the form says to keep them at home. Nobody wants to wait weeks for a letter about a missing page.
Keep a photocopy of everything you mail, and use tracked post if the deadline is close. We couldn’t find a CRA statement about mailing dates or how a postmark counts for 2026 returns, so check the deadline on canada.ca before you rely on the date on your envelope. For the 2025 return, our data lists 30 April 2026 as the filing date for most individuals. For the 2026 return the usual date is 30 April 2027.
And if your only reason for mailing is to avoid a screen, try the take-home pay calculator first. Once you know your yearly numbers, the form gets easier to fill.
Official page on this topic: Canada Revenue Agency: Contact the CRA.
Where do these details come from?
The addresses, fax numbers, the no walk-in statement and the list of areas are on the CRA‘s contact pages on canada.ca, read on 30 September 2026. Tax figures in the example come from 2026 federal and Ontario data. Addresses change now and then, so confirm on the CRA site before you post anything important. This is an independent guide, separate from any government body. We rechecked the Sudbury addresses and fax numbers on the CRA’s tax centres page, and the no walk-in service line on its office locations page, in November 2026.
Frequently asked questions
What is the CRA Sudbury address for a tax return?
Income tax and benefit returns go to Sudbury Tax Centre, 1050 Notre Dame Avenue, Sudbury ON P3A 5C2. Other correspondence goes to Post Office Box 20000, Station A, Sudbury ON P3A 5C1. Copy the postal code exactly, because the two addresses use different codes.
Who sends paper returns to the Sudbury tax centre?
The CRA lists New Brunswick, Newfoundland and Labrador, Nova Scotia, Nunavut and Prince Edward Island, plus several Ontario and Quebec areas. The CRA’s tax centre page lets you pick your closest city and shows your address, so check it for your own postal code before mailing.
Can I visit the Sudbury tax centre in person?
No. The CRA’s office locations page says there is no walk-in counter service at its tax centres and offices. The Sudbury site handles mail and fax. For questions, use your CRA account, or phone the CRA number on its contact page and have your SIN ready.
Do all Ontario residents mail returns to Sudbury?
No. The CRA names several Ontario cities as tax centre choices, including Barrie, Belleville, Kingston, Ottawa, Peterborough, St. Catharines, Sudbury and Toronto. Which one applies depends on your address, so use the CRA address finder rather than guessing from the nearest city.
Is there a fax number for the Sudbury Tax Centre?
The CRA gives 705-671-3994 and 1-855-276-1529. Use them only for documents the CRA says it accepts by fax, and check the fax cover details on the CRA page. Never fax a full return unless the CRA tells you to, since NETFILE or mail is the normal route.
Is it better to file online than mail to Sudbury?
For most people, yes. Certified software checks for errors, files faster and sends the return the same day, and refunds usually arrive sooner than with paper. Paper is still allowed if you cannot or prefer not to file electronically, so mail it early and keep a copy.
- Dealing with the CRA: letters, audits and payments
Dealing with the CRA: what to do when a letter arrives, how a review differs from an audit, how My Account helps, and what to do if you can't pay