My last years and year before e-filed TurboTax is not in the dropdown box "your tax return and documents" where it should be .. How can I find it?

You have to sign onto your online account using the exact same User ID you used to create the online account.

Close all TurboTax windows on your web browser (including this one).  Copy and paste the account recovery website link onto a new web browser window and run the tool.

Use this TurboTax account recovery website to get a list of all the 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 none of the user ID's received will access your account, then use the option shown in blue on the account recovery website, "Try something else"

If you used the desktop CD/Download editions installed on your computer, the only copy of your tax data file and any PDF's will be on the computer where the return was created.  TurboTax does not store online any returns completed using the desktop editions.

If you used the TurboTax online editions for the 2020 tax return, you will need to start a 2021 tax return and have your personal information entered before the section for getting a PDF of a prior year online return will become available. 

To access your current or prior year tax returns sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/

Scroll down to the section Your tax returns & documents.  Click on the Year and Click on Download/print return (PDF)

If you still cannot access your account, you can contact TurboTax customer service/support through their contact website during business hours.

See this TurboTax support FAQ for a contact link and hours of operation - https://ttlc.intuit.com/questions/3401489

Submit your question/problem during business hours and then use the option for Call (a phone number will be provided for Call) to speak directly with a TurboTax agent -

Note:  The Call option will not be available when TurboTax Support is closed.

Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax