The hours of operation are 7 a.m. Use this tool to get an EIN directly from the IRS in minutes for free.Find your original confirmation letter from the IRS. EIN confirmation letter is typically a tax ID certificate. 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. Current Active Employees: Go to UOU Login and enter your CIS uNID and password. Current Active Employees: Go to UOU Login and enter your CIS uNID and password. We guarantee accurate filingfill out a quick questionnaire and we will get back with a confirmed EIN for your business. Identification Numbers and Codes. Membership cards are not sent in the mail.