they started for the financial year of 2024 for those who stays more than 180days in thailand..... income brought into thailand is taxable unless your country have a double tax exemption with thailand
go to a tax revenue office สำนักงานสรรพากร near you with your passport and get yourself a tax ID after which they will check whether your home country have agreements on (double tax) exempt as my income have already been tax hence there's no tax for me here but I still keep my tax ID for future use
why need appointment? Just take a queue number and give them your passport and copies of lease agreement ....gentle reminder your funds have to sit in your bank acct for 2months before applying for extension
Bangkok bank have been very strict recently with residency cert....kbank or SCB will be a better choice in big shopping malls who are used to foriegmers I did kbank with nonO and lease agreement .....SCB with nonO and thai driving licence no need to waste time getting residency cert
Try getting a 90days non O instead of OA in Belgium as it does not need insurance.....after you get your non O fly to thailand and open bank acct and buy insurance here in thailand extend your 90days to 1yr by depositing money into thai bank acct get a re entry permit to leave thailand it does not matter how many months you stay in thailand or Belgium and make sure to plan your yearly extensions