Not filing with my spouse, why does it ask for her income?

Every individual who reports married or common law must identify their partner by providing their Name, Social Insurance Number (SIN), Date of Birth and his/her Net Income. The Canada Revenue Agency (CRA) uses your net income, and your spouse's or common-law partner's net income (or total household income) to calculate the amounts, such as the Canada child benefit, GST/HST credit, social benefits repayment, and certain other credits.

You have to enter your spouse's or common-law partner's net income on page 1 of your return under "Information about your spouse or common-law partner,".

For more information, please visit: Line 23600 – Net income

Marital status

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