At any time in 2024, did you stop financially supporting your spouse or common-law partner or receiving support from them because you weren’t living together?
Your answer to this question helps us determine if you or your spouse or common-law partner can claim the eligible dependant amount for the year. If the two of you separated in 2024 and you either provided financial support or received financial support it from your estranged partner, neither one of you can claim this amount.

- Updating your marital status (CRA website)