F-56 and 541 for Estate (California question!)

Hello! Couple questions regarding required forms for estates.
My trust attorney apparently never sent one in after the court process was completed in November 2024. I just found out. I'd like to send it to them now, before I send the taxes in - should I backdate it to 2024 or just leave it as today's date? And after the taxes are filed next month (initial & final return), do I need to fill out another F-56 at the end of the year to Terminate my role as executor? Or do I just leave it be, and mark "final" on the 1041 and 541?

Lastly, the estate passed on all its income ($100k on 1099-R) to the trust via a K-1, so no taxes will be due for the estate, correct? - But does a 541 still need to be fill out? Because a CPA recommended a 1041 but not a 541...

Thank you!!

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