For 90 days report.
Before 90 days ,if we go out Thailand and come back.The report count from entry day or visa start day.
TLDR : Answer Summary
The 90-day report for expats in Thailand resets each time you leave the country, even for a single day. When you re-enter, the counting starts from the day of entry, which is considered day one for the next reporting period. This means that if an expat exits Thailand and returns within the 90-day timeframe, they will not need to complete the reporting requirement until 90 days have passed from their latest entry. Additionally, despite the 90-day reporting, expats are still expected to continue their tax and social security contributions in their home countries, as noted in discussions regarding the double taxation agreement.