The name and address of the other parent. 1. Fill out a child support modification petition. 2.File the petition with the Family Court that most recently established your order. 3. Qualified Medical Child Support Order. Modification of Support. Visit the family court where your court order was issued and complete a Support Petition for Modification form (also known as Form 4-11). There's a DIY form program that you can use to ask the court to change your child support order. Step 1: Fill out these forms. Intheblanks form authorizing a filing agent to efile documents on behalf of an individual attorney. Modification of Child Support. Form. Title. Download. Revised.