Learn about EIN numbers, why they're essential for businesses, and how to apply for one with this comprehensive guide.

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.

However, if the new EIN is not obtained online before a certain date in December, the tax practitioners and their clients may not get the transaction completed before year-end. This is because the ...