How to fill Form RC66 (Canada Child Benefits Application) — and autofill your details with my-id.ca
Fill the Canada Child Benefits Application (RC66) without retyping your family's details
Form RC66 — Canada Child Benefits Application is the Canada Revenue Agency (CRA) form you use to apply for the Canada child benefit (CCB) and related federal, provincial, and territorial child benefits. It also registers your children for the GST/HST credit. This guide is an example of storing the repeating identity fields in my-id.ca — it is not tax or legal advice, and my-id.ca is not affiliated with the CRA or the Government of Canada.
Official form and source
Start from the official CRA source and always use the current version — form numbers and links can change:
- Form (CRA): RC66 Canada Child Benefits Application — canada.ca
- How to apply: Canada child benefit — how to apply — canada.ca
What this form is about
RC66 tells the CRA who you are, who your children are, and your family situation, so the CRA can calculate your child benefit. If you (or your spouse or common-law partner) became a resident of Canada in the relevant period, the CRA usually asks you to also complete the companion schedule RC66SCH (Status in Canada and Income Information).
Who files it
A parent or primary caregiver completes RC66. The repeating fields are your name, address, SIN, marital status, and each child's name and date of birth — exactly the kind of details my-id.ca stores once.
Before you start: what to gather
- Your full legal name, address, and SIN (and your spouse or common-law partner's, if applicable).
- Each child's full name and date of birth, and proof of birth if the CRA asks for it.
- Your residency dates if you are a newcomer, for the RC66SCH schedule.
Confirm income-reporting and residency rules on canada.ca — these are specific to your situation.
How my-id.ca makes it faster
- Store your family's details once. Save your name, address, SIN, marital status, and your children's names and dates of birth in my-id.ca.
- Autofill the identity fields. Use the my-id.ca Chrome extension on any online form, or fill a PDF of the RC66 from your saved profile inside my-id.ca.
- Enter the situation-specific details yourself — residency dates and income information.
- Review every field against the CRA instructions before submitting.
Why do it in my-id.ca
Your name, address, SIN, and your children's details repeat across RC66, the RC151 GST/HST credit application, and future CRA forms. Stored once in my-id.ca — in Canada, with self-hosted AI — each application starts mostly filled.
Frequently asked questions
- What is CRA Form RC66 for?
- RC66 is the Canada Child Benefits Application. You use it to apply for the Canada child benefit (CCB) and to register your children for related programs such as the GST/HST credit. Confirm the current form and eligibility on canada.ca.
- Do newcomers need an extra form with RC66?
- If you became a resident of Canada (or your status changed) in the period covered, the CRA usually asks you to also complete the companion schedule RC66SCH (Status in Canada and Income Information). Check the RC66 page on canada.ca for which schedule applies to you.
- Does my-id.ca calculate my benefit or submit the form?
- No. my-id.ca autofills your repeating identity details — your name, address, SIN, and your children's names and dates of birth. The CRA determines your benefit amount, and you review and submit the application yourself.
Fill it once. Reuse it everywhere.
Save your information in my-id.ca once, then autofill this form and the next one — web forms with the Chrome extension, PDFs right in the app. Your data is stored in Canada and AI runs on my-id.ca's own servers, never sent to third-party AI providers.