Do I need to report my stay every 90 days after a border run to Myanmar?

After returning from a Myanmar border run, your 90-day reporting requirement resets according to the date of re-entry into Thailand. Therefore, if you have physically left the country and entered again, you do not need to report for the previous 90-day cycle. Instead, your new 90-day reporting period starts from the date of your re-entry. Make sure to keep track of your presence in Thailand, as you only report if you have stayed in the country for a consecutive 90 days.