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@misc7   Do you still need to file 2020?   How to Access prior year online returns
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/00/270...


If you can't get the side menus to open up to access the prior year..... You need to start entering some basic Personal Info in 2021 for the side menu to open up. Just continue a little ways into 2021.


If you used the Desktop CD/Download program then the only copy is on your computer and not saved or stored online.

 

Then to efile 2021 try entering 0 for the AGI since 2020 was not filed in time.