Massachusetts Court System. Probate and Family Court forms for modifications.Learn how to request changes to your child support order with the Massachusetts Department of Revenue. Go to the court that made the child support order. Worksheet to Request a Modification of Your Court Order. Use this form to help you decide whether to ask the court to change (modify) your child support order. Recently was served with child support modification. Ex states he changed his job and his salary. Obtain the Necessary Forms: Contact your local family court or child support agency to obtain the required forms for requesting a modification of child support. Learn how to lower or increase your child support payments with the help of Massachusetts family law modification attorneys at Miller Law Group, P.C..