Unfortunately, as of December 2024 we no longer sell products for 2017 or earlier, but you can download the forms from the CRA here: https://www.canada.ca/en/revenue-agency/services/forms-publications/tax-packages-years.html
You can see what we have for past years here: https://turbotax.intuit.ca/tax/software/prior-year-taxes
Thank you for choosing TurboTax.
