This person died on. , (date of death) at the age of _____ years.Online legal forms are useful for frequent, basic, and necessary tasks. Here is a checklist of important things to do when someone close to you dies in Washington State. File the final income tax returns of a deceased person for current and prior years, pay any balance due and claim the refund. Complete the Distribution Due to Death Request Form. 3. Attach a copy of the Death Certificate with the Distribution Due to Death Request Form. 4. A date of death value letter provides account balance information on the date the account owner passed away.