To access your current or prior year online 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 bottom of the screen and on the section Your tax returns & documents click on Show. Click on the Year and Click on Download/print return (PDF)
The complete federal and state tax returns for 2020 along with all worksheets and information only pages will not be available in the PDF download until the online editions for tax year 2021 become available in early December.
This occurs each tax year when the online editions shut down at the end of October so that the prior year returns can be archived and the next tax year is brought online. It is always a good idea to download a PDF of your tax return after it has been accepted by the IRS along with the tax data file (.tax)
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.