@Graham *****
exactly, for the starting date, but, if you don't leave Thailand, and return, your next 90 day report date starts brand new in the day you file your 90 day report. Your next 90 day report will be 90 days from that day you file. It no longer is based on the date you entered the country. As an example if you file your first 90 day report 10 days before your 90 day report date, your next 90 day report date would be only 170 days since you entered instead of 180, 90+90. Your next 90 report is based on the day you filed your last 90 day report.