How can I obtain a 60/90 day tourist visa for Thailand if I'm an American traveling for a yoga course?

An American traveling to Thailand on May 3 for a yoga course can initially enter with a 30-day visa exemption. To obtain a 60/90-day tourist visa, they will need to visit a Thai embassy or consulate in Bangkok. Required documents typically include a passport valid for at least 6 months, a completed visa application form, recent passport-sized photographs, proof of accommodation, and proof of financial means. Since the traveler does not have access to a printer, it's advisable to check if forms are available on-site or can be filled electronically.