that is sometimes a problem at airports. The checkin people are not always up to date with the rules.Maybe almost impossible, get travellers to all over the world. I have had same kind of problems but asking fotr the supervisor is sometimes the easiest way\ to solve the problem.
yes but question was about flying to the usa and your reply was about returning to thailand. My answer was on returning to thailand too. No special extra costs exept the well know costs for entering thailand.
why? Flying to thailand is a new start. Coe etc etc nobody cares how you flew to the US. Do not even have to mention it if you decide to apply for flying to Thailand
incorrect. in principle if you live more than 180 days a year in thailand you COULD be taxed. Depends on where the income is coming from, if there is a treaty between the country where you eaned the money and much more. Ask a tax consultant before you are going to ask for a tax id.
many retirees do have a tax id. For instance if they pay tax on there pensionfund income in thailand instead of in their home country. And for more reasons
hoe come many complications.just easy to get that few papers and the money stays yours! Cost is 400 us dollars. Elite visa looks more complicaties and price is 1.000.000 baht for 10. Years. 400 dollars versus 1 millon baht !