What if I don't know my spouses income because I am filing before him

[TurboTaxJennifer · Accepted solution]

CRA recommends that you estimate the amount if you haven't prepared his return yet. If you aren't able to estimate, it's best to prepare his return as well as yours or at least before you prepare yours as certain amounts, such as childcare expenses, must be assigned to the lower income spouse.

https://turbotax.community.intuit.ca/replies/2647950