passed away in November 2020
You might want to consult with a tax professional in your area.
If you want to use TurboTax for this purpose, you will have to use a desktop (installed on a computer) version.
See https://turbotax.intuit.com/personal-taxes/past-years-products
Note that the return is late at this point and you should read the relevant sections of the IRS publication at the link below.
https://www.irs.gov/publications/p559#en_US_2021_publink100099488