When you log in to do her taxes for 2023 (and for 2024 if she has enough earnings to require her to file) TurboTax will ask if the taxpayer is deceased and you will answer 'yes'. There are a few other questions about whether you have the authority to file the return on her behalf and whatnot.
The biggest thing is that if she has a refund you may be required to mail in the return along with copies of the paperwork showing that you have been appointed as her executor - if that is the case.
You should save all tax paperwork for 7 years to be on the safe side. Nothing older than that is necessary. So as of April 15th of this year you can get rid of everything from 2016 and back.
@RKerr
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