The IWO is the OMBapproved form (PDF) used for income withholding in tribal, intrastate, and interstate cases as well as all child support orders. Complete Form W-4 so that your employer can withhold the correct federal income tax from your pay.Give Form W-4 to your employer. These instructions provide guidance to QDDs regarding the proper withholding agent status code to use when filing Form 1042 (and Form 1042-S). Withholding Tax Forms and Instructions To ensure you are able to view and fill out forms, please save forms to your computer and use the latest. To aid you in completing the STD 686 Employee Action Request (EAR) form as a new employee or to update your withholdings, the following is a Quick Start Guide. There is a link to it in the W4 form. The employee is to fill out the STD 686 Employee Action Request (EAR) accordingly.