The Employment ID Number is located in the box listed right by the name and address of that employer. If it is not listed on your W2, You can call that Employer's HR department who handles the W2s and advise that their EIN was not listed on your W2. They will provide that to you. If you are mailing in your Return to the IRS, along with that W2, add the EIN# your Employer gives you, in that box if it is blank, to be able to mail it in properly. Hope this helps.
