The Iowa Application To Modify Child Support is a form used for making changes to an existing court-ordered child support order. This form is available in both an electronic and a paper version, and must be filed with the court to modify an existing order. There are two types of Iowa Applications To Modify Child Support: an Iowa Child Support Modification Application and an Iowa Child Support Modification Agreement. The Iowa Child Support Modification Application is used when a parent wishes to make a formal request to the court to modify their child support order. The Iowa Child Support Modification Agreement is an agreement between two parents to modify an existing court-ordered child support order without the need for a formal court hearing. Both forms must be completed and submitted to the court in order to make changes to an existing child support order.