Income withholding is the court or administratively ordered deduction of a specified amount from a parent's income for payment of child support. This website is intended to provide general information, forms, and resources for people who are representing themselves in Nevada's courts without a lawyer.Is Nevada the right place to file? A Nevada court can make child custody and visitation orders if Nevada is the "home state" of the children. The IWO is the OMBapproved form (PDF) used for income withholding in tribal, intrastate, and interstate cases as well as all child support orders. Fill out the Statement of Registration of California Support Order (FL-440) and attach a filed copy of the support order or income withholding order. Nevada Child Support Guidelines Calculator. A free web application tool to calculate the child support guidelines obligation.