What are the rules for reporting 90-day visits in Thailand, and can I report late?

Yes, you can report your 90-day visit in Thailand up to 14 days before the deadline, or no more than 7 days after the deadline in person at the immigration office. However, late reports when done online are not accepted. There are mixed reports about the success of late reports at different immigration offices, with some individuals getting approved even a few days late, while others faced refusals. It's advisable to ensure compliance to avoid potential issues, especially when traveling shortly after the reporting deadline.