The Tax Department is streamlining withholding tax and wage reporting forms and Web File applications. Use Withholding Tax Web File to file your quarterly return.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. 06. CAL. Allen City. 0.417500. 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 accurately determine the correct amount of Massachusetts withholding, employers will rely on Massachusetts Form M4.