If there is no room whatsoever to place the amount of tax already paid on a Thai tax return, how does one calculate the tax?
A) suppose you bring 1,000,000 THB into Thailand you deduct the deductions as follows: 60,000 THB + 190,000 THB + 100,000 THB remains 650,000 THB
you then calculate according to the tax brackets. First tax bracket no tax , second tax bracket is 5% and so on...
Thus, on the 650,000 THB you need to pay 27,000 baht according to the rules. However, now you can say I have already paid 80,000 baht tax in my home country result: here you must pay 27.000 THB minus 80.000 THB that you has pay this means you do not pay tax
or
B) you bring 1,000,000 THB into Thailand you deduct the deductions 60,000 THB + 190,000 THB + 100,000 THB + the 80,000 THB that you have already paid in your home country
remains 570.000 THB
you then calculate the tax brackets, first tax bracket has no tax, second 5% and so on
result you pay 19,500 THB tax