File a signed copy of federal Form 706 with the Florida Department of Revenue and pay. Florida estate tax due.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. For a copy of the deceased person's tax return, submit Form 4506, Request for Copy of Tax Return. There's a fee for each return you request. Form F-706 Filing Requirements. The requirement to file Form F-706 depends upon the date of death. You should also complete and file with the final return a copy of Form 1310, Statement of Person Claiming Refund Due a Deceased Taxpayer. You'll need the person's Social Security number and certified copies of their death certificate for most agencies and programs.