Whether your spouse has filed a return or not, you should always include an amount for the spouse’s income as per the Canada Revenue Agency (CRA).
When you don’t know your spouse’s income and can’t find out through reasonable means, the CRA recommends that you enter your best estimate.
Important: If you don’t enter your spouse’s income (or an estimate), it’s important that you don't claim the Spousal Amount. For more information, read the Spouse or common-law partner amount page on the CRA website.
For further information, please check our TurboTax FAQ: What if I don't know my spouse's income?
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