What documents do I need for my 90-day reporting in Thailand and where should I go?

To complete your first 90-day reporting in Thailand, you need to bring the TM47 form, the TM30 receipt, and your original passport. This process is not handled at the Division 1 immigration office for the NON-O extension; instead, you need to go to the Chaengwattana office located at the Government Complex Building B. For walk-ins, go to Counter A, and if you have an appointment, go to Counter B.