Get Answers Support Tax Filings & Payments W2 General Can I use SSN instead of EIN in Form W-2 Box b? Last modified 3/31/2023 11:14:04 AM EST No, you should not enter an SSN in Box b. Use the EIN assigned by the IRS. If you don’t have an EIN when filing, enter all zeros. You can apply for an EIN by submitting Form SS-4. Was this helpful? Yes No Need more help? Get in touch with our dedicated support team Contact Us (704) 684-4751 support@taxbandits.com Sign Up for a FREE TaxBandits Account! The Smart CPA Choice Register Now Already have an account? Sign in