@eltibbe , I just tried a new return with Thailand as my address --- no issue. I used a Thai bank interest ( just because I needed some income ) -- no issue. I am using windows version of Home & Business but all the windows versions should operate similarly. I also looked up the code for Thailand that IRS recognizes and indeed it is TH.
Thus my only suggestion would be to delete the country code on the entry screen for 1042-S and re-enter TH, making sure there are no "unprinted" characters, spaces etc.
If you are US citizen, living in Thailand , why are they issuing you a 1042-S ? When I lived abroad for a whole bunch of years back in the eighties, my banks etc. all issued 1099s and not 1042-S.
Is there more I can do for you ?
