We have a company (been with us and exempt for a long time. Now they have changed their name, EIN, and are now a Listed Company. I know we need to amend their exemption, but how would "they" know who it is if the EIN has changed. I'm stumped on this one. Thanks for any input.

It sounds to me that you are now dealing with a different entity, which means that you must treat it as a new customer and file a new exemption. Because it is a listed company, you won't need to wait before filing a new Form 110 Designation of Exempt Person.

You can let the old exemption lapse without filing a termination form.

John, Thank you for your quick response!