Forms may be obtained from the Self-Help Center and click Simplified modification of support order. Parents tell the court about their agreement to make an initial (the first) order for child support or modify (change) existing orders.The mission of the Santa Clara County Department of Child Support Services is to promote the well-being of children and the self-sufficiency of families. Forms needed to file for child support modification. Form number, form name, download it from. Our San Jose Support Modification Attorney at Aeschleman law can take the actions necessary to help you. Call today! In San Jose child support modification, our attorneys will help you examine your assets and seek out any hidden assets. The San Jose order modification lawyers at Moreno Family Law Firm can help modify court orders for child custody, support, and more. You file a Request for Order (FL300) for Modification of Child Support in the court and case in which child support was ordered.