At a minimum, you usually have to start thru some of the initial the 2020 tax return questions first, before those left-side selections appear.
And DO NOT use "Documents" , instead, when it appears, click on "Tax Home", and then scroll down the page to find the section to expand to show prior year's tax forms.
Of course, nothing will show up for any prior year if you are not in the exact-same account you used to file those prior year(s).
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
