If you’re filing a return for someone who's passed away, there are some additional forms you’re going to need when you file.
First, you generally need to file the last Form 1040 on behalf of the deceased person (also called a decedent return) along with any applicable state resident return. The information on this return is used to report taxable income and deductions until the date of death of the decedent.
Any income earned after this date is reported on a trust return Form 1041, US Income Tax Return for Estates and Trusts. You’ll need an Employer Identification Number from the IRS, which you can get here:
This is where the additional forms come in: