Anonymous participant 778 becareful with the terminology. Is not a rule I have not seen any Thai immigration say that (Its 157 days) because this guideline is only associated with visa exempt × 2 with a extension and border bounce
Overstay is normally used when talking your visa end date. 90 reporting can be done 15 days before or up to 7 days after. The max fine is 2,000thb but probably 300thb if you give yourself up. It can be done online after the first report.
Its a controller drug. Its normal to see a doctor who will prescribe the medication and should have in stock, i get a blood pressure drug 3 months worth at a time.
There is a tax treaty between UK and Thailand, but I know nothing about it. A quick AI App search did not role out him being liable for tax, if he leaves before the 183 say 175 he should fine. Only a tax advisor could confirm if hes concerned. If he came in so hes been here 180 days he should be fine as well
Two or three months office dependent, before you submit your extension. You should then keep during the 30 day (or what ever) consideration period before you get the final stamp.