Every employee must complete two withholding forms: For federal taxes: the W-4 Employee's Withholding Certificate form filed with the Internal Revenue Service. Gov (search: IT-2104-I) or scan the QR code below.You are required to file withholding certificates when you begin employment with the City of New York or transfer to another agency. Information about Form W4, Employee's Withholding Certificate, including recent updates, related forms and instructions on how to file. Click below for up-to-date forms and documents for use in submitting address or name changes, W4 forms for adjusting withholding status when needed. Common reasons for completing a new Form IT-2104 each year include the following: • You started a new job. • You are no longer a dependent. 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. These are the most frequently requested US Department of Labor forms.