How to Change Your Phone Number with the CRA
You can change your phone number with the CRA three ways: online through CRA My Account (fastest — changes usually take effect immediately), by phone after identity verification, or by mail by including your full name, Social Insurance Number, new phone number, and signature. Update your number as soon as it changes — especially after moving or switching providers — so you don’t miss CRA notices or security verifications. Only ever update your details through official CRA services; never give personal information to unknown callers, emails, or texts claiming to be from the CRA.
Why Updating Your Phone Number Is Important
An up-to-date phone number allows CRA to:
- Contact you about your tax return or account issues
- Provide security verification when you access CRA services
- Send alerts related to benefits, credits, or account changes
Ways to Change Your Phone Number
Online Using CRA My Account
The fastest way to update your phone number is through CRA My Account. Once logged in, you can update your contact information securely, and changes usually take effect immediately.
By Phone
You may also update your phone number by calling CRA. You will be required to verify your identity before any changes can be made to your account.
By Mail
In certain situations, you may need to submit your request by mail. Include your full name, Social Insurance Number, new phone number, and your signature to help CRA process the update.
When Should You Update Your Phone Number?
You should update your phone number as soon as it changes, especially if you recently moved, changed service providers, or no longer have access to your previous number.
Protecting Your Information
Only update your phone number using official CRA services. Never provide personal or contact information to unknown callers, emails, or text messages claiming to be from the CRA.
Need Help?
If you are unable to update your phone number online, a CRA agent, tax professional, or free tax clinic may be able to assist you.
Additional Read: FREE income tax clinic
Frequently Asked Questions
What is the fastest way to change my phone number with the CRA?
Through CRA My Account. Once logged in, update your contact information securely — changes usually take effect immediately.
What do I need to include if I update by mail?
Include your full name, Social Insurance Number, new phone number, and your signature so the CRA can process the update.
When should I update my phone number?
As soon as it changes — especially if you’ve moved, changed service providers, or lost access to your old number. An outdated number can mean missed notices and failed security verifications.
Can I update my phone number by calling the CRA?
Yes. You’ll need to verify your identity before any changes are made to your account.
Saving in the wrong registered account can quietly destroy a low-income worker’s retirement setup. Read our guide on TFSA vs RRSP for Low Income Earners: Avoid the GIS Retirement Trap to discover why RRSP withdrawals trigger a hidden 50% benefit clawback—and how shifting to a TFSA protects your Guaranteed Income Supplement benefits.
* * * * Most viewed topics * * * *
FREE Canadian Dental Care Plan Coverage – Online Application*
