Issued by IRS. This site is not the issuer. Checked against the issuer on 2026-11-03. Issuer's page · Instructions · Instructions: on the form, pages 2–4
When you start a job or have changes to your income, you fill in this certificate so your employer knows how much federal income tax to withhold from your paycheck. You will need your Social Security number, your anticipated tax filing status, and details about any additional jobs, dependents, other income, or deductions. You must sign and date the form before handing it over directly to your employer, as it is not valid without your signature.