Should I claim somewhere that a house I owned was sold? Parents bought in 2017, I was 3% owner, I lived in house but never legally changed address. Sold in 2020.

Yes. You’ll need to report the sale of your share of the house.

If it was your Principal Residence, this FAQ tells you how to report the sale in TurboTax: https://turbotax.community.intuit.ca/community/tax-topics/help/how-do-i-report-the-sale-of-my-home-principal-residence/00/873724

If it wasn’t your Principal Residence, you’d report the sale as a capital gain or loss. This FAQ tells you how to report capital gains or losses in TurboTax Online: https://turbotax.community.intuit.ca/community/investments/help/where-do-i-report-capital-gains-or-losses-in-the-online-edition-of-turbotax/00/873778