Here's a good link on how to transfer from Desktop to Online.
You can transfer from the prior year on your computer into the Online version. You will need to have the .tax2020 file on your computer. If you used the Desktop program last year here’s How to switch and transfer from the Desktop program into the Online version........
https://ttlc.intuit.com/community/tax-topics/help/how-do-i-switch-from-turbotax-cd-download-to-turbo...
