Complete the on-line application for free child support services if you live in Illinois and the dependent child(ren) lives with you. This article discusses registering other states' custody and support orders in Texas so that Texas courts can change and enforce them.Illinois Divorce, Child Support, and Maintenance Forms (Illinois Courts). Download and complete Divorce, Child Support, and Maintenance forms from the Illinois Office of the Courts. Are you expecting to receive or provide alimony payments after your divorce? Learn about the types of spousal support in Illinois here. In Illinois, to be eligible for alimony, spouses must have been legally married. Either husband or wife can qualify for alimony. The main difference is that alimony is paid to support the exspouse, while child support is paid to support the child. Learn how child support is calculated in Illinois, whether parents can agree to support below the guidelines, and how to change the amount of support.