The spouse or common-law partner amount is automatically calculated in TurboTax based on your spouse/partner's net income, which means that you are unable to edit this amount in your return. You may only choose whether to claim or not claim the amount altogether.
If your spouse/partner is a non-resident of Canada, you may still be eligible for the spouse or common-law partner amount if you are supporting them. If you immigrated or emigrated during the tax year, the CRA recommends that you contact them to determine your eligibility.
If you don't want to claim the spouse or common-law partner amount, click here for instructions on how to remove it from your return.