What you need
to get started.

Business with
Employees

International Revenue Service Website.

Federal Employment
Tax Information

Internal Revenue Service Website.

U.S. Department of Labor
Employer Information

Access to more than 180 federal laws and mandates.

Form SS-4:
Application for Employer
Identification Number

Internal Revenue Service website.

Form 1-9:
Employment Eligibility
Verification

U.S. Citizenship and Immigration Services website.

Form W-4:
Employees Withholding
Allowance Certificate
2023 (English)

Tax withholding form.

Form W-4 (SP):
Employees Withholding
Allowance Certificate
2023 (Spanish)

Tax withholding form.

FAQs
on the 2020 Form W-4
Released

Updated Withholding
Calculator, Form W-4
Released

Calculator Helps Taxpayers Review Withholding Following New Tax Law.