Arrive first time without visa as a tourist, stay 12 days , and 2nd time , you can show your visa at immigration at airport and start your stay with visa
I had conjunctivitis in 2023 and the doctor said I was unfit to fly. I was so sick at immigration and easily got a 30-day extension for medical reasons on an already extended TR-60 visa
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.