Great work, quick question, when is the earliest or latest one can do a 90 day report from the due date? Just trying to synchronise a visit with a friend in one trip. Thanks in advance.
TLDR : Answer Summary
You can submit your 90-day report in Thailand 15 days before the due date up to 7 days after the due date if done in person. For online submissions, it's from 15 days before up to the due date. Mail submissions are allowed before 15 days of the due date for Bangkok only, while for other immigration offices, it’s best to check directly with them. If issues arise with the online system, consider alternative troubleshooting methods.