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.Divorce and Family CasesOrder of Protection Brochure. The Child Support Application is available for download in Portable Document Format (PDF). It can then be filled out on your computer. For more information about going to court including how to fill out and file forms, call or text Illinois Court Help at 833-411-1121 or go to ilcourthelp.gov. Free Child Support Enforcement and Information. The Illinois Department of Child Support Enforcement offers Information and Free Child Support Enforcement . ❑STEP 1 : Fill out the Petition for Modification of Child Support. 4-3b. Addendum to Support Petition– Request for Child Support (IV-D) Services.