The DTV in many cases is stamped employment prohibited even when you apply as a workation, working remotely on a DTV you are NOT classed as working in Thailand for tax purposes therefore you are NOT earning a Thai income and will not be liable for tax provided the income remains overseas. Thailand only taxes foreign sourced income on remittance.
let’s just take a quick look at those statements of yours.
1) 180 days = tax resident, yep if in a calendar year.
2) Tax residents must declare taxable income. False, only assessable income above minimum thresholds is declarable.
3) Foreign sourced income that is remitted in the same year that it was earned. False, foreign sourced income if earned in a year you were tax resident would still be taxable if remitted in future years.
4) Tax residents must file a personal income tax return. False. Tax residents who have a tax liability must file. No liability = no filing requirement.
Just copy and pasting without actually understanding the tax law isn’t doing you any favors. I will repeat you can live perfectly legally in Thailand without being required to get a TIN and without having to file a tax return. You obviously didn’t read the actual tax law I so helpfully referenced earlier.
I think for myself and live quite legally in Thailand and have done for many years without a Thai tax liability or a TIN requirement or a tax filing requirement.