Having an up-to-date telephone number with the CRA is important since it may be needed for multi‑factor authentication (MFA) or when the CRA needs to contact you by phone.

For information about when the CRA may contact you by phone and how to recognize a scam, visit Scam prevention and the CRA.

How to change your phone number

Online

My Account can help you quickly and easily manage your tax affairs online, including changing account information such as your phone number.

You can manage the telephone numbers that the CRA will use if you need to be contacted or for multi-factor authentication by selecting “Profile” and then “edit” under contact information in My Account.

If you are unable to sign in to your account, call the CRA to get access.

Sign in to My Account / Register for My Account

Alternative: MyCRA web app

By phone

Change your telephone number by phone

Before you call

To verify your identity, you will need:

• your social insurance number (SIN)
• your full name and date of birth
• your complete address
• an assessed return, notice of assessment or reassessment, other tax document, or be signed in to My Account

If you are calling the CRA on behalf of someone else, you must be a legal representative.

Telephone number

1-800-959-8281

Yukon, Northwest Territories and Nunavut:
1-866-426-1527

Outside Canada and the United States (operates in Eastern Time):
613-940-8495

Hours

Day	Hours
Monday to Friday	8 am to 8 pm
Saturday	9 am to 5 pm
Sunday	Closed

Closed on public holidays