I bought the turbo tax disc for 2020. For 2019 I used the online version. How do I transfer those returns to my ocmputer?

You can’t import or open TurboTax Online files in TurboTax CD/Download. You can still download/print a PDF of your past years returns for your reference. This FAQ tells you how: https://turbotax.community.intuit.ca/community/tax-return-print-save/help/in-the-online-edition-of-turbotax-how-do-i-print-a-copy-of-my-tax-return/00/873651

Thanks for the answer. I have bought the disc every year at Costco for many years. Last year I was surprised when there was no disc but an online key. This year there was a disc again so I suppose I just have to enter all of our vital stats again rather than being able to transfer all info over........Sigh.