The financial institutions (in Canada) where I have accounts have requested I provide a Thai Tax ID. Since I don't have one (the RD in Phuket would not give me one after they were fully (100% accurately) advised of my tax situation), I instead provided the Canadian financial institutes my Thai Pink-ID #, noting it not yet activated as a Tax ID. That is consistent with what the Thai RD office told me. On the other hand, the German financial institutes, where I have accounts, have not (as of yet) asked from me a Thailand Tax ID. I suspect there a vast number of different tax situations for all of us - and to varying degrees, each expat's liability/requirement to file or not to file a Thai tax return is different.
