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. How to manage employee tax withholdings. Withholding tax accurately is the legal responsibility of the issuing company. First, you'll fill out your personal information including your name, address, social security number, and tax filing status. Learn about income tax withholding and estimated tax payments.