How can I extend my METV visa in Bangkok?

To extend your METV (Multiple Entry Tourist Visa) while in Bangkok, you need to visit the immigration office located at the government complex on Chaengwattana Road. There, you will find copy shops where you can make the necessary photocopies. You will need to fill out the TM.7 form and attach a passport-sized photo. The cost for a 30-day extension is 1900 baht.