Learn how to make property tax payments in person, over the phone, or online. Update your legal name or mailing address.You may file for the Property Tax Refund on paper or electronically. The due date is August 15. Find information on Hennepin County properties including but not limited to taxes due (tax statement), current and prior year taxes, assessment values. File property tax petitions to appeal property tax assessments. Find petition forms from property tax court. Property tax statements. Hennepin County mails property tax statements in March. 1. Complete MN Tax Court Form 7, following the instructions carefully. 2.