Gov (search: IT-2104-I) or scan the QR code below. 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). Notice: Some internet browsers have a built in PDF viewer that may not be compatible with our forms.