Ace the Certified Payroll Pro Test 2026 – Payroll Masters, Your Time to Shine!

Form SS-4 is the correct form used to apply for an employer identification number (EIN). An EIN is a unique nine-digit number assigned by the IRS to identify a business entity. Form SS-8 is actually used to request a determination of worker status for purposes of federal employment taxes and income tax withholding. Form 8233 is used by foreign nationals to claim a tax treaty exemption on income other than personal services income, and Form 1042-T is used to report tax withheld on certain income of foreign persons.