Getting or changing personal tax information

If your enquiry requires us to access your account and release or update personal information, we will ask you to identify yourself. Please be prepared to provide the following:

• your social insurance number or business number;
• your name or business name;
• your complete address or complete business address;
• for individual accounts, your date of birth;
• for individual and trust accounts, details from your account or your most recently assessed return, notice of assessment, reassessment, or other tax document; and
• for business accounts, details from your business account or your most recently assessed business-related tax information return.

If you wish to deal with the CRA on someone else’s behalf, you must be an authorized representative. Before you call, please see the following webpages:

• for individuals: authorizing or cancelling a representative
• for businesses: authorizing a business representative