Learn about the kinds of spousal support in California, how judges decide the amount and duration of alimony, and whether you can change the award later. Illinois Divorce, Child Support, and Maintenance Forms (Illinois Courts).How can you enforce or modify a child support order from another state in an Illinois court? Start with paperwork. The question of whether you will need to pay alimony in addition to child support depends on your circumstances as presented to the court. It's definitely better to have the judge say, "Gross income" or "Post-tax income," so you're sure. California uses a formula that considers multiple factors in alimony calculations. The primary laws governing alimony are found in the California Family Code. Download and complete Divorce, Child Support, and Maintenance forms from the Illinois Office of the Courts. I'm unable to work because of a disability.