An Employer Identification Number (EIN) is a crucial part of running a business in the United States. This unique nine-digit ...

Employer Identification Number (EIN) Definition: A 9-digit number obtained by a business with paid employees from the IRS. If you're a sole proprietorship, your EIN is your social security number.

See how we rate tax products to write unbiased product reviews. An employer identification number (EIN) is a unique nine-digit number issued by the Internal Revenue Service that identifies ...