good luck to stay in thailand "full year" and say that your habitual abode is not mainly in thailand 😑. If your income is from country with dta it is not big deal...
Participant(e) anonyme if you don't want to be tax resident in thailand, don't stay more than 180 days in thailand. Your home country mean nothing about tax, what is important is : 1/ your country tax residency ( that will probably be thailand if you stay more than 180 days here). 2/ the country from where come your income. If you remit that income to thailand, you need to pay maybe tax money on it, if the income come from country with dta, you can use them as tax credit ( to lower the thai tax to maybe / probably 0 ). What kind of income you have ? The benefit of being thai tax is you may not have to pay tax elsewhere ( or lower tax ). If you already pay > 35% on income from dta country you will pay 0% in thailand. If your income is about 1.7 millions baht/yearly and already pay about 20% tax from dta country you will pay 0 in thailand. The main problem is that even if you have to pay 0, you need to do tax report and accounting ( most people dont do ) 😞