This form is used to request the issuance of income withholding for support. The IWO is the OMBapproved form (PDF) used for income withholding in tribal, intrastate, and interstate cases as well as all child support orders.State and federal law require DCS issue a wage or income withholding notice when an employee's child support order contains withholding language. Instructs employers and federal agencies on how to process income withholding orders including examples of calculations. Fill out forms for Child Support Worksheets and Order. Washington Forms Online. Wage withholding lets you make your child support payments through your regular paycheck. This guide includes forms and instructions for a letter and affidavit to request that the court register an outofstate custody order in Texas. The Northwest Justice Project has a program called Washington Forms Online. It helps people fill out family law forms on a computer.