OK, sounds like submitting a 'final return' for the FFT and the old EIN is the proper thing to do to close that old EIN. Then all future returns will be filed for the FFT with the new EIN.
But I'm still a little confused about not filing an 'initial return' for the FFT with the new EIN. I think someone on this chain has said not to do that since an initial return was done for the FFT with the old EIN. If I do a final for the old EIN, will the IRS know that the FFT is using the new EIN when I file the return for tax year 2022 without an 'initial return'? What are your thoughts on that? Also, how do I submit a 'disclosure form' like you mentioned so I can explain this unusual situation?
PS - I'm having problems finding my original question and all the follow-up. Can you tell me how to do that? When an update is made, I get an e-mail with a link to that update (which I click on) but I only see the reply but not the entire chain of remarks. How can I see that? For example, how can I see all the questions to the community that I have created and that are open (ie, unclosed)? Thanks.
