You can petition the court yourself or utilize Child Support Services (CSS) to review your case at no charge. You must have a case with CSS for our assistance.This Easy Form helps you ask the court to increase or decrease your current child support order. This is called child support modification. Form: Petition for Modification of Child Support. First blank: Your name. If you want to change the amount of child support that has been ordered, you will need to file a motion asking the judge to do that. A program to help you create the forms to ask the court to increase or decrease your current child support order. What to do right now: 1. Sign the "Petition for Modification of Child Support," and sign and date the "Certification" part at the bottom of the petition.