Your employer will use the information you provide on this form—including residency, marital status, and allowances—to withhold these taxes from your pay. Complete Form W4 so that your employer can withhold the correct federal income tax from your pay.Consider completing a new Form W-4 each year. This video goes over how to fill out a 2021 Form W-4 if you are single and the basics behind Form W-4. Complete el Formulario W-4 para que su empleador pueda retener la cantidad correcta del impuesto federal sobre los ingresos de su paga. A W4 form, or "Employee's Withholding Certificate," is an IRS tax document that employees fill out and submit to their employers. Today we are talking all about the new york state withholding form and how to fill that out. Your original withholding choice will remain in effect until you file a new IRS W-4P form or California DE-4P tax withholding election form with OCERS.