Your employer will use the information you provide on this form—including residency, marital status, and allowances—to withhold these taxes from your pay. 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. Learn about income tax withholding and estimated tax payments.