What is the correct time frame for submitting a 90-day report in Thailand?

For filing a 90-day report in Thailand, the in-person submission can be made from 2 weeks before to 1 week after the due date. For online submissions, it is from 2 weeks before until 1 week before the due date, although some offices may allow submissions up to the due date. For mail-in submissions, the packet must be postmarked 14 days before the due date.