You must file a tax return for an individual who died during the tax year if: A return is normally required; The decedent did not file prior year return(s). Refer to Their Will.This interview will help you determine how to file a decedent's individual tax return. Information you'll need Two common ways to avoid probate on your bank accounts are holding the account jointly or designating a beneficiary for the account. The process of claiming a bank account after death varies based on a number of factors. Here's how to claim a deceased person's bank accounts. If paper-filed, write "Deceased," the taxpayer's name, and the taxpayer's date of death across the top of the final return. File the final income tax returns of a deceased person for current and prior years, pay any balance due and claim the refund. File an estate income tax return.