An estate administrator must file the final tax return for a deceased person separate from their estate income tax return. Put your check in the drop box on the 6th floor of the administrative tower at the Hennepin County Government Center.You may file for the Property Tax Refund on paper or electronically. The due date is August 15. Call the Registrar's office at (651) 430-6292 or (651) 430-4425 to find out the procedure to initiate an informal probate proceeding. 1. Complete MN Tax Court Form 7, following the instructions carefully. 2.