The Tax Department is streamlining withholding tax and wage reporting forms and Web File applications. Download Form W-4 V: Voluntary Withholding Request from the IRS' website.Complete Form W-4 so that your employer can withhold the correct federal income tax from your pay. Instructions. Purpose of Form. If you receive any government payment shown below, you may use. You must give Form NJ-W4 to your employees to fill out and return to you. This form tells you how to withhold tax from your employee's pay. To accurately determine the correct amount of Massachusetts withholding, employers will rely on Massachusetts Form M4. You must complete a new Form 8233 each January.