All the income your parent had up to the date of their death would be reported on their 2020 tax return. There was a box to check for "this person passed away in 2020."
Any income received by the person after the date of their death is actually received by their estate, and you would have to file a form 1041 estate tax return. The estate also needs a special tax number, it can't use their SSN. You can't file an estate return with regular turbotax, you need Turbotax Business, which is a separate program only available by download or CD for PC, there is no Mac or online version.
If your parent received a round 3 stimulus payment (EIP 3, paid in February-April 2021) but they died before 1/1/21, you must return it to the IRS, but a tax return is not required.
https://www.irs.gov/newsroom/questions-and-answers-about-the-third-round-economic-impact-payment-top...
Do you have another reason to file a 2021 tax return for your parent?
