GenuTax is the free software I used for Canadian taxes

I used https://www.canada.ca/en/services/taxes/income-tax/personal-... (or an equivalent page, in case it's shifted around) to look for options a couple years back. I was glad I had this list to look through. I believe I compared Wealthsimple, EachTax, and UFile.

Wealthsimple Tax is free too, and pretty good for simple use cases.