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Yes, you must note your status as in the “information about you” section of your tax return, including information about your spouse – their name, social insurance number, net income, and employment status. Once you are married, you must include your spouse. The CRA knows your true marital status based on the information you file, credits and deductions you apply for, and based on other information that is sent in which relates to you.
Please see our TurboTax article of Facts Every Canadian Needs to Know About Filing Coupled Tax Returns