Yes. You always can transfer fro the prior year no matter what you used the year before. Even Mac to Windows or Online to Desktop and vis-à-vis.
You just need the file ending in .tax2020 on the computer to transfer. It should be in your Documents then in a Turbo Tax folder. Start a new 2021 return and it should find any 2020 files and ask if you want to transfer it. If you are on a different computer just copy the .tax2020 file using a flash drive.
How to transfer into Windows Desktop program
https://ttlc.intuit.com/community/entering-importing/help/transfer-last-year-s-return-to-turbotax-fo...
How to transfer into Mac Desktop
https://ttlc.intuit.com/community/tax-data-file/help/how-do-i-transfer-last-year-s-return-into-the-t...
