New EIN for LLC

I elected S-Corp taxation status in early 2023. I did not realize that the IRS would subsequently send me a new EIN for the S-Corp, but rather I thought I would continue to operate my business under the same EIN that I had been using for my sole prop/LLC. I began to pay quarterly estimated taxes and made monthly federal tax deposits under my initial EIN, but then realized this could be a problem once the IRS ultimately sent me a new EIN for the S-Corp. Trying to determine how to figure this out, as it seems I may have paid taxes on behalf of the old/wrong EIN?

I’ve written to the IRS asking for them to allow me to use my original EIN for my S-Corp, and not the new one they sent me, but I have not heard back from them.

Any input would be much appreciated.

Many thanks.

Answered on Today’s show (recorded Feb 7 - should be out in a couple days). Thank you so much for the question. Mark and Mat.