The Tax Department is streamlining withholding tax and wage reporting forms and Web File applications. You must always complete boxes 4a (chapter 4 exemption code) and 4b (chapter 4 withholding tax rate) regardless of the chapter indicator entered in box 3.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. You must make all deposits of taxes paid with respect to Form 1042-S (including taxes withheld under either chapter 3 or chapter 4) electronically. Want to file online? Use our Online Property Listing System to file your current year listing form.