Yes, separated persons file separate tax returns.
The Canada Revenue Agency considers you to be separated from your spouse or common-law partner if your relationship has ended, you have been living apart for at least 90 days and you have not reconciled.
You are required to notify the CRA of a change in your marital status promptly.
You might consider filing a return to claim any benefits or tax credits for which you may be eligible now that you are separated, even if you are not required to file a return.
References & Resources
- Canada Revenue Agency: Marital Status Questions and Answers
- Canada Revenue Agency: Do You Have to File a Return?
- Separated couple status
- Marital status taxes
- Common-law partner separated