1. From an earlier discussion, since I'm on social security now I will have to mail my taxes in from now on, correct?
Correct, so it seems.
2. They asked for my social security amount, but since I don't have to pay taxes on SS in the USA....how do you correct the issue?
I've seen some absolutely bizarre suggestions from TT, including figuring SS as normal but using Schedule 1 to offset taxable amount.
The simple way is to not tell TT about SS. On your 1116 (I believe I'm correct in thinking you have pensions taxed by the UK?), be sure to deduct the apportioned amount of UK tax paid on SS, then after you print off the completed return, simply write in ink the gross amount of SS received on line 5a, and put "0" in line 5b (taxable amount).
3. When putting in my bank interest info, it confused TurboTax and stated I should wait until the end, print it off to see what "line" to put it on. But....when TTax was doing a review it demanded that info but wouldn't let me put the info in.
Did you complete Schedule B first? I don't understand this, so will let the TT users respond.
4. I am also assuming that I will still have to use my old address in the US and bank (still have that open) info to purchase TTax before I can run a copy off?
TT only wants a US based credit card with a US address for the purchase. For the 1040, use your UK address.
5. Kind of feel silly asking this since it has been so long since I mailed a tax return in......do I put a copy of all bank account/bonds etc in when I mail it? Or just leave it as the TTax print off?
All you include is the tax return and any W2's or required 1099's. You do not need copies of any documents for UK sourced income - like bank statements.
*I am having to do FATCA (form 8938) this year....what a pain. I was using the .758 exchange rate (on all financial info from here in the UK) and not the .784 (for pensions?). I was over the $400K end of year limit.
For the tax return, most would use 0.7840, although you may use any rate which can be substantiated by any recognised exchange.
For form 8938 and FBAR, you must use 0.7580.