File in person:​​ Go to the Civil Filing counter on the third floor of the C Tower in the Hennepin County Government Center in downtown Minneapolis. File a motion with Hennepin County District Court.You may file a motion to modify your support order. You may amend a return in our eServices system to update the tax withheld, wages, and number of employees. In this chapter you will learn how to fill out the motion to modify child support form. File property tax petitions to appeal property tax assessments. Find petition forms from property tax court. A motion to modify the support amount must be served and filed with the court. The court may approve or deny the modification. The IWO is the OMBapproved form (PDF) used for income withholding in tribal, intrastate, and interstate cases as well as all child support orders.