The Employer Identification Number (EIN), also known as the Federal Employer Identification Number (FEIN) or the Federal Tax Identification Number, is a unique nine-digit number assigned by the Internal Revenue Service (IRS) to business entities operating in the United States for the purposes of identification.

Step 1. Click Corporation in the navigation menu.

Step 2. Select a corporation from the list. 

Step 3. Click Edit the Additional Details.

Kindly take note that if you don’t have the information, Add questionnaire  "I-129: Petition for a Nonimmigrant Worker Questionnaire (From Employee/Beneficiary)" on the corporate profile to gather this.