Your spouse or common-law partner cannot be claimed as your dependent. However, if you supported your spouse or common-law partner at any time during the year, and they have a low income, you may be able to claim the Spouse or common-law partner (SCP) amount.
TurboTax automatically calculates the SCP when you enter your marital status and complete your spouse’s personal information section.
Unused tax credits from the lower income spouse may also be transferred to the other if needed to reduce taxes. The CRA website provides more information.