A formula guideline for figuring child support obligation amounts. 1.01(A) Michigan's child support guideline (also known as the "formula") consists of this manual and its most current supplement.If you have a judgment of divorce or a final order in a custody case that didn't include child support, you can file a motion to ask for a child support order. Fill out Praecipe, Motion, and Financial Information Form. If your case is with one state or tribe, contact your local child support office. It's your best resource! Child Support Formula. Federal and Michigan law requires that the child support formula be used to determine child support amounts . Looking for help regarding custody, visitation, or other legal issues? Click here to reach Michigan Legal Help.