Child Support Forms ; 4-8c. Pay your child support online and make sure your child is getting financial support from both parents.The IWO is the OMBapproved form (PDF) used for income withholding in tribal, intrastate, and interstate cases as well as all child support orders. Petition forms are available through this website, or upon request from the General Clerk's Office. ➢ Call to make an appointment: (631) 854-3183.