Each Canadian files your own tax return and indicates their marital status on the return, and who you are married to / living with.
The Canada Revenue Agency(CRA) knows your true marital status based on information you file, credits and deductions you apply for, and based on other information that is sent in which relates to you.
Or you can file a coupled return together in TurboTax.
For more information and details, please click:
TurboTax How do I prepare a spousal or coupled return in TurboTax Online?
TurboTax Facts Every Canadian Needs to Know About Filing Coupled Tax Returns
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