I was born in the UK and moved to the US for 44 years. I'm a citizen of both countries. I returned to live in the UK last November. I'm in desperate need of advice concerning my tax resonsibilities. Reading through the IRS site I can only find help for "Expats" which they mean is someone who has relinquished their US citizenship. I'm pretty sure I don't have to pay tax in both countries but don't what forms to fill in for the IRS.