I recommend getting your move done with first - or at least do not change addresses while the Form 1 is in process. It will simplify things.
I'd recommend to consult the lawyer who did your trust with regard to any of its paperwork changes. Normally a 5320.20 is how you notify the ATF of an address change.
hope this helps
Last edited by Zak Smith; 05-03-2012 at 15:57..