Where to mail your Canada Child Benefit application (Form RC66)
Mail Form RC66 to the Winnipeg Tax Centre, PO Box 14005, Station Main, Winnipeg MB R3C 0E3 if you live in Alberta, BC, Manitoba, Saskatchewan, the territories, or Nunavut; to the Sudbury Tax Centre, PO Box 20000, Station A, Sudbury ON P3A 5C1 from Ontario or the Atlantic provinces; or to the Jonquière Tax Centre from Quebec. Careful: the Winnipeg benefits box is not the same one your tax return uses.
AB, BC, MB, NT, NU, SK, YT
Winnipeg Tax Centre PO Box 14005, Station Main Winnipeg MB R3C 0E3
RC66 applications from Alberta, British Columbia, Manitoba, the Northwest Territories, Nunavut, Saskatchewan, and Yukon
NB, NL, NS, ON, PE
Sudbury Tax Centre PO Box 20000, Station A Sudbury ON P3A 5C1
RC66 applications from New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, and Prince Edward Island
Quebec
Jonquière Tax Centre 2251 René-Lévesque Boulevard Jonquière QC G7S 5J2
RC66 applications from all Quebec residents
Mail it without printing anything
Upload your document — we print it, seal it, and deposit it with Canada Post within 24 hours on business days. $6 flat, no account needed, and you get a Confirmation of Mailing email for your records.
Key facts
- The Winnipeg benefits address — PO Box 14005, Station Main, R3C 0E3 — is a different PO box and postal code than the T1 return address (PO Box 14001, R3C 3M3). Copying the address off your tax return is the classic RC66 mistake.
- Nunavut is the odd one out: RC66 applications go to Winnipeg, but Nunavut T1 returns go to Sudbury. The two streams do not match.
- All of Ontario mails RC66 to Sudbury — even the six southwestern cities whose tax returns go to Winnipeg.
- Quebec residents mail RC66 to Jonquière regardless of region; the Montréal/Outaouais/Sherbrooke split that applies to T1 returns does not apply to benefit applications.
- If your spouse or common-law partner is a non-resident or recently arrived, include Form RC66SCH (Status in Canada and Income Information) with your application.
- PostPal deposits your letter with Canada Post the next business day — order early for deadline filings.
How to mail it, step by step
- 1
See if you even need the paper form
Many parents are enrolled automatically when they register a birth through their province, or can apply in CRA My Account. Use the paper RC66 if neither applies — for example, if you are new to Canada, your child started living with you, or you are adding a child after a change in custody.
- 2
Fill out RC66 and gather any extras
Complete every section of Form RC66 and sign it. Add Form RC66SCH if you or your spouse became a resident in the last two years or are not Canadian citizens, plus proof of birth for any child the CRA has not previously paid benefits for.
- 3
Match your province to the right benefits address
Western provinces, the territories, and Nunavut: Winnipeg Tax Centre, PO Box 14005, Station Main, Winnipeg MB R3C 0E3. Ontario and the Atlantic provinces: Sudbury Tax Centre, PO Box 20000, Station A, Sudbury ON P3A 5C1. Quebec: Jonquière Tax Centre, 2251 René-Lévesque Boulevard, Jonquière QC G7S 5J2. Do not reuse the address from your tax return envelope.
- 4
Mail it and keep moving
Benefits start flowing only after the CRA processes your application, so every week in a desk drawer is a week of delay. Upload your signed RC66 to PostPal and we print and deposit it with Canada Post the next business day — $6, no printer or post office trip needed.
Common questions
Why is the Winnipeg address for RC66 different from my tax return address?
The Winnipeg Tax Centre uses separate intake streams: benefit applications go to PO Box 14005, Station Main, Winnipeg MB R3C 0E3, while T1 returns go to PO Box 14001 with postal code R3C 3M3. They are different boxes with different postal codes, so an RC66 mailed to the return address can sit in the wrong queue.
I live in Nunavut — Winnipeg or Sudbury?
For the Canada Child Benefit, Winnipeg: PO Box 14005, Station Main, Winnipeg MB R3C 0E3. This catches people off guard because Nunavut tax returns go to Sudbury. Benefits and returns follow different maps, so check each one separately.
I live in Hamilton and my tax return goes to Winnipeg — where does my RC66 go?
To Sudbury. Every Ontario resident mails RC66 to the Sudbury Tax Centre, PO Box 20000, Station A, Sudbury ON P3A 5C1 — including residents of Hamilton, Kitchener, Waterloo, London, Thunder Bay, and Windsor, whose T1 returns go to Winnipeg.
I live in Montréal — does my RC66 go to Sudbury like my tax return?
No. All Quebec residents, including those in Montréal, the Outaouais, and Sherbrooke, mail RC66 to the Jonquière Tax Centre, 2251 René-Lévesque Boulevard, Jonquière QC G7S 5J2. The Sudbury routing for those three regions applies only to T1 returns.
Do I need to mail RC66 at all, or can I apply online?
Many parents never touch the paper form: provincial birth registration can enrol you automatically, and CRA My Account offers an online application. The mailed RC66 is mainly for newcomers to Canada, custody changes, and situations where the online routes are unavailable.
What documents should go in the envelope with my RC66?
The signed RC66 itself; Form RC66SCH if you or your spouse arrived in Canada within the last two years or are not citizens; and proof of birth (such as a birth certificate copy) for any child the CRA has not paid benefits for before. Send copies, not originals.
Sources
Addresses verified June 2026 against official sources. Always confirm on the official site before time-sensitive filings.