How do I select "documents" from the "menu to the left"

[drummer28drums]

How do you access prior year returns?

[MissMCJ]

Click Tax Home on the left

The  go to the bottom of the page and select My Tax Returns and Documents

Select the year and then you can view or print a pdf of the return for that year.

[VolvoGirl]

To access a prior year you may have to start a 2020 return in that account.  Just enter some basic info.  See this answer by Don with a screen shot

https://ttlc.intuit.com/community/after-you-file/discussion/i-am-trying-to-download-and-print-off-my...

Are you in the right account?  It's common to end up with multiple accounts. First LOG OUT of whatever TurboTax account you're logged into right now. Then use this TurboTax account recovery website to get a list of user ID's for an email address. Run the tool against any email addresses you may have used
https://myturbotax.intuit.com/account-recovery/

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