It sounds like you might be talking about TurboTax download editions that you purchased from our website.
You can always reinstall prior year versions of our TurboTax download editions at any time, so long as you've kept your Installation Key Codes. You can find links to our prior year download versions here: https://turbotax.community.intuit.ca/replies/3001486
So long as you registered your copy of TurboTax when you installed, our support team should be able to help ou track down lost installation keys, should that be needed.
