Hi Courtney - you express that really well.
One of my relatives drives a bus. I asked him once how he could do it (I couldn't) what with having to concentrate all day, work lousy hours and deal with rude passengers. He said it was easy. It is what he does, he drives. However he said he couldn't do what I do because he just doesn't understand money.
So the short answer is some folks get the tax and money complications but can't do other stuff. Some people find the constant translation between one set of tax laws and another real complex but are clever in other ways.
So the answer here is that a good tax or financial adviser will have qualifications, this is just sensible to protect yourself. But - and this is the most important to my mind - they will be someone you feel you can get on with.
There are loads and loads of qualifications.
The UK has:
CIOT (Chartered Institute of Accountants)
ATT (Association of Taxation Technicians)
FTA (Federation of Tax Administrators)
ICAEW (Institute of Chartered Accountants in England & Wales)
ICAS (Institute of Chartered Accountants in Scotland)
ACA (Association of Chartered Certified Accountants)
PLUS: a whole bunch of different financial planning qualifications from Institutes such as the Personal Finance Society.
The US has:
CPA (Certified Public Accountants) - licensed at State level by State Boards
EA (Enrolled Agents to the IRS) - licensed at Federal level
PLUS: a whole bunch of different and competing financial planning qualifications
So what I'd advise anyone to do is contact a few people, probably dual qualified in the US and UK so neither set of rules is overlooked by accident, and then choose someone based on what sounds best in terms of personality and price.
Its going to be a bit like buying a house; you may like the first one you see or you may have to see a few to decide...
Don't forget that just because some consultants at your chosen firm may have qualifications you may find you are passed down the chain to save costs, in which case you could end up paying for training of junior staff so ask about the team working on your affairs too...
I know that Lizzit and I do all the stuff you guys are discussing but there are other and larger firms able to help as well so I think its got to come to a personality fit.