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. Gov (search: IT-2104-I) or scan the QR code below. Learn about income tax withholding and estimated tax payments. An alphabetical-by-topic list is provided below containing information and downloadable PDF forms, when available, or links to external resources. Your employer will use the information you provide on this form—including residency, marital status, and allowances—to withhold these taxes from your pay. See United Way of Tarrant County's VITA sites.