5 For the tax year, have you paid an amount in child support equal to or more than the amount due for every order requiring you to make child support payments? Child Support Forms ; 4-3a.Petition (Commissioner). OCSS services include assistance with locating noncustodial parents, establishing parentage, establishing child support and medical support orders. 5258: Enroll for Child Support Services (PDF) (6 pages). Note: This form also applies to some tax benefits, including the child tax credit, additional child tax credit, and credit for other dependents. You may use a tax return, pay stub, W- 2 or any financial document that will assist you in completing the form. Child support payments are not taxable. That means the parent making the payments cannot deduct them from income and their receipt is tax free. This online program from Family Legal Care guides you through filling out a Petition for Child Support.