The process begins when you apply for child support services or when your local child support office receives a referral from another public assistance program. When is income withholding required?When the Court issues an order of support, the Court must in every case order immediate income withholding unless:. Apply for Child Support Services. When a child support order is entered into our automated system an income withholding is sent to the non-custodial parent employer. Nevada Child Support Guidelines Calculator. A free web application tool to calculate the child support guidelines obligation. If you need help completing this form, call 518‑457‑5181. Duration of withholding request. This website is intended to provide general information, forms, and resources for people who are representing themselves in Nevada's courts without a lawyer.