Hello,
I have the question, when I have to do my 90 day report?
I entered Thailand on 17th of April on 45 Days visa exemption and then did a 30 day extension.
On 14th of June I applied for the in Country ED- Visa, getting the “under consideration”-stamp and got my ED-Visa stamped in on 29th of June, so my ED-Visa is now from 14th of June until 11th of September.
TLDR : Answer Summary
After obtaining your ED visa in Thailand, your first 90-day report will be done during your first extension of stay. At that time, the immigration office will provide you with a notification stapled in your passport indicating the due date for your next 90-day report.