No information is available for this page. Forms needed to file for child support modification.Form number, form name, download it from. 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. We are open Monday through Friday, a.m. There are several key steps to requesting child support modifications. The first among them is to file a motion with the court. You may file your own modification pursuant to California Family Code Section 3651. Download a free child support modification form to propose changes to a current child support agreement. Available in PDF or Word format.