Complete the on-line application for free child support services if you live in Illinois and the dependent child(ren) lives with you. For more information about going to court including how to fill out and file forms, call or text Illinois Court Help at or go to ilcourthelp.gov.Use this form to show they have adequate means of financial support and are not likely to rely on the US government for financial support. The Child Support Application is available for download in Portable Document Format (PDF). It can then be filled out on your computer. Enter the county where your Order for Support was granted. 3. Enter your full name. 4. Download and complete Divorce, Child Support, and Maintenance forms from the Illinois Office of the Courts. Form I864, Affidavit of Support is widely known to be one of the more complicated immigration forms to fill out. The Office of the Clerk of the Circuit Court is a participant in the federal and state funded child support collection and enforcement services.