Read our SS-4 instructions guide to make completing the form easy. We'll walk you through each step and highlight important considerations.

IRS Form SS-4, Application for Employer Identification Number, is a form businesses use to apply for an employer identification number (EIN).

Key takeaways IRS Form SS-4 is used to obtain an Employer Identification Number (EIN) for your business or other entity such as a trust or estate. The SS-4 form requires detailed information about ...