Thank you Durhamlad. I will go through the list. Just looking for planning advice for US retirement savings.not tax preperation.
You're welcome. If your questions are about the different treatments retirement savings receive in the USA and UK then maybe ask some of those here, there are various threads here on withdrawing lump sums, IRA to Roth conversions etc.
In general, distributions from retirement savings accounts are treated the same in both countries, that is they are taxed as regular income. Both countries respect the pension envelope and the monies within retirement accounts such as SIPPs and IRAs are not taxed at all until distributions are made. Distributions from Roth IRAs are tax free in both countries.
With after-tax savings such as mutual funds in the USA and ISAs in the UK then there are important differences that you should be aware of.