Businesses and other entities use an employer identification number, or EIN"sometimes called ... Once yours has been processed, you'll receive a letter from the IRS with your ITIN.

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.

Obtaining a new EIN before year-end can be quite difficult with the online application shutdown. Fortunately, there are ...