The Illinois Child Support Data Sheet is a form used to determine the amount of child support payments that a non-custodial parent is responsible for in the state of Illinois. The form is used by the court to determine the amount of child support payments that a non-custodial parent is responsible for, based on the parents' incomes. There are two types of Illinois Child Support Data Sheet: the Short Form Child Support Data Sheet and the Long Form Child Support Data Sheet. The Short Form is used for parents with a combined net income of less than $150,000, while the Long Form is used for parents with a combined net income of at least $150,000. The form requires information such as the parents' incomes, the number of children, the number of weeks of parenting time, and other information. The form is used to calculate the amount of child support payments that a non-custodial parent is responsible for.