The TurboTax Free File Program is only for the current tax year, 2020.
To complete and file a prior year tax return, 2018 or 2019, using TurboTax you would need to purchase, download and install on a personal computer one of the desktop editions for each tax year from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/
A prior year tax return can only be printed and mailed, it cannot be e-filed.
