Parents tell the court about their agreement to make an initial (the first) order for child support or modify (change) existing orders. Qualified Medical Child Support Order.Visit the family court where your court order was issued and complete a Support Petition for Modification form (also known as Form 4-11). To file your request, review the instructions worksheet, then complete the Motion to Modify Child Support and the necessary Financial Statement. This free program will help you fill out the papers that you will need to file in Family Court. Call Back Service QLess Reservation System Request a return call from the office you need assistance from, return calls are usually within 10 minutes. You can petition the court for child support modification or request that the local child support agency review your existing agreement. You may also file Form FL-311, Child Custody, and Visitation, though this is optional. Fill out our Event Request Form to get started. Committed to assisting parents to obtain the financial support necessary for their children to prosper in a stable setting.