Qualified Medical Child Support Order. 1. Fill out a child support modification petition. 2.File the petition with the Family Court that most recently established your order. 3. Use this program to ask (or "petition") the Family Court to change a support order if there is a "change in circumstances." Child Support, Visitation, Custody and Paternity Petition Forms. If you are asking for child support or a change to your child support order, fill out the Summary Form for Financial Information. I am requesting a modification of child support based upon the following change of circumstance since the last order for child support was entered: 1. Us with the subject 'Modify Order' and request a phone appointment. No information is available for this page. Tina and Tim walk you through the Petition to Modify Child Support along with providing tips on how to fill it out.