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 the business, ...

An employer identification number (EIN) is like a Social Security number (SSN) for a business. The IRS assigns an EIN — also known as a federal tax ID number — to any business that is eligible. EINs ...

Companies, like people, are usually known by their names, but people and companies both have other types of identification, often issued by government agencies in the form of identification numbers.