I was in the exact same place…. Lived here 25 yrs, did the Feie because it was easy…. However then my Parents died, inheritance and I was given 60:days to get my parents iras sorted and out of the USA…. It was a mess. It will be worth having someone. I ended up with a dual qualified ifa in london, and a tax guy. I’d go with a good not online tax firm first if I were you. I then reverted to doing my own and kids’ when I got the hang of it. I could only find an ifa after the inheritance, due to minimum thresholds.