Complete the on-line application for free child support services if you live in Illinois and the dependent child(ren) lives with you. Download and complete Divorce, Child Support, and Maintenance forms from the Illinois Office of the Courts.Packets of forms are available for sale to be used in filing a new case or modifying a case in either the Family or Civil courts. The Payment Estimator applies the statewide uniform guideline calculation to the information that you enter into the blank fields. Child Support Forms ; 4-3b. Addendum to Support Petition– Request for Child Support (IV-D) Services. If you wish to make a payment, please set your browser preferences to allow cookies. The SDU website will not work properly if cookies are blocked. Divorce, Child Support and Child Custody. 94. Forty-three percent of children in the United States are being raised without their fathers. 95.