Thanks for asking your question! I'm sorry to hear about your tax issue and I'm going to try my best to help you understand or resolve it.
The IRS cannot provide a copy of your original SS-4 form, but they can give you what's known as a 147C letter which will verify your EIN number assigned
This letter will give you all the information you need, and the same information that would be on your original application
This 147C letter should suffice.
Is there anything else that I can assist you with today? If not, please rate my response as "excellent" so that I may receive credit for assisting you today.