Introduction. This page includes information and forms for modifying child support in an existing divorce, custody or parentage order. Salt Lake City, UT 84145.ORS looks at current child support orders to see if they should be changed. E90A Confirmation of Custody Change. Complete this form if we currently collect child support for you but the children are now living with someone else. Helpful tools for successfully obtaining the modification you want include any documents of proof for your recent change in income. To modify a child support order, you may take one of two approaches: Filing a Motion to Modify Child Support or filing a Petition to Modify Child Support. Call today to see if you can modify your child support. Phone or in-person consultation. 801-990-4200. Explore comprehensive child support modification forms and procedures for navigating child support changes and custody modifications effectively.