I prior year tax return can not be done with any online version of TurboTax. You can only file the current tax filing year, which as of this post is tax year 2022. For prior year tax returns you have to purchase and install the CD version for Windows or MAC, and they can only be installed on a Windows or MAC computer. So when/if you purchase the CD version make sure you get the correct one for your operating system.
Note also that the TurboTax program is only supported for the current tax filing year (2022 at this time) and three years back. So if you need to file a return for 2018 or earlier, you can't use Turbotax.
