Last week I went to my local rural RD office with last year's bank statement about a load of other paperwork and after a 5 minute chat about remitted income,180 days etc was firmly told that I don't have to file... Not unless you remit large sums of money, one million baht up for example.
Of course, some "online tax expert" who's been brainwashed by all the bovine excrement that's been banded about by the English speaking media will probably quote me and say that the revenue department employee we spoke to was just plain wrong...I can't wait!
I've tried, I've failed, I'm now moving on to more important matters.