a bit misleading though. Take the example of a UK pensioner whose only income is the state pension. Their income is below the level at which they pay tax in the UK so £12,000 or 500,000 baht. No tax credit to offset thai tax. So 60k personal allowance, 190k age allowance and 150k zero rated gives 400k. Tax due at 5% on 100k baht assuming nothing else to claim for. Oh and on a uk income of £39k you are going to pay around 13.5% tax not 20%
that seems odd if they've already asked for more information. But supplying more information normally results in the count being reset and this is probably the busiest time of year for them. You might need to reschedule your flight
where on earth did you get that figure from? It makes absolutely no sense. If in a year you are thai tax resident you bring in 120k baht or more assessable income you have to file a Thai tax return. Whether or not you actually have to pay tax or not will depend on what thai tax allowances you can claim, including any credit you can claim for tax already paid on that income if it's taxed in a country with a dual tax agreement
The problem is you don't have a bank account I guess, either that or sufficient time left on your current stamp. You can go to Laos or any other nearby country and apply there without any problems showing funds in your home bank account. Once the visa is issued return to Thailand, open a bank account and put a minimum of 800k baht in it once your back. The 800k needs to be in place for 2 full calendar months before your 90 day Non-O visa expires so you can apply for a 12 month extension of stay