If you separated or divorced in
2017, the CRA will still require your spouse’s information to calculate your
eligibility for certain credits.
If you separated or divorced
before 2017, you say "No" to the question "Did you separate from
your spouse/partner in 2017?".
To make changes, select “Marital
Status” from the “Setting Up” tab. Choose the correct options and click the
“Continue” button to save your information.
If you can’t see a “Setting Up”
tab, use the grey “Back” button to go backwards through the pages until you get
to the “What's your marital status?” page.
I’m separated or divorced. Why am
I being asked for info about my former spouse/partner?
https://turbotax.community.intuit.ca/replies/3425400
What do I do if I don’t know my
spouse’s income? https://turbotax.community.intuit.ca/replies/2647950