Additional withholding amounts​​ To ask your employer to withhold an additional amount each pay period, complete lines 3, 4, and 5 on Form IT-2104, as applicable. Tax Withholding Forms and Instructions.Federal Withholding Certificate (W-4). To claim exempt status, you must meet certain conditions and submit a new Form W-4 and a notarized, unaltered Withholding Certificate Affirmation each year. For more information on withholding and when you must furnish a new Form W-4, see Pub. 505, Tax Withholding and Estimated Tax. Every employee must complete two withholding forms: For federal taxes: the W-4 Employee's Withholding Certificate form filed with the Internal Revenue Service. To claim you are exempt, you write "Exempt" on the new W-4 form in the space below Step 4(c). Step 5: Sign and date your form. Learn how to fill out a W4 form with this updated indepth guide for 2025.