Can I do my 2020 and 2021 taxes on turbo tax?

[DoninGA]

The TurboTax online editions are only for tax year 2022.

To complete and file a prior year tax return using TurboTax you would need to purchase, download and install on a personal computer one of the desktop editions for each tax year required from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/

Prior year tax returns can only be printed and mailed, they cannot be e-filed using TurboTax.  When mailing multiple tax years use a separate envelope for each year.