Use this tool to get an EIN directly from the IRS in minutes for free. The only two ways to get an EIN Verification Letter (147C) is to call the IRS at 1-800-829-4933, or to mail the IRS a written request.The simplest way to get a copy of an EIN verification letter is to call the IRS. Follow the below process to obtain a tax ID verification letter. EIN confirmation letter is typically a tax ID certificate. The Employer ID Numbers (EINs) webpage provides specific information on applying for an EIN, making a change in the application for an EIN, or canceling an EIN. 1. Submit a request to Tax Services. I will help you to get EIN Number for your business is located in the USA. How to Contact the IRS for EIN Verification Letter? Your Federal Employment Identification Number (EIN).