To enroll, please complete an application and send it to Tarrant County Child Support Services. Clipboard and Pencil.Here's what to expect when you request for a modification of your child support order. Click here to learn the steps in the modification journey. A CSRP is for parents who are willing to negotiate and agree to an order to modify child support, medical support, dental support and obtain judgments. You're always welcome to change the way you make your child support payments, but the court-ordered amount can change only through a court order. Order (Relief from Support Payments and Commitment). PDF. 4-16. Notice of Motion To Quash, Fix or Modify Conditions of A Child Support Subpoena. Step 1: Fill out your court forms. Fill out the following starting forms: ○ Petition to Modify the Parent-Child Relationship.