What documents are required to extend a 60-day visa to an additional 30 days in Thailand?

To extend a 60-day tourist visa in Thailand to an additional 30 days, individuals need to prepare the following documents: 1) Passport and a copy of it, 2) A passport-sized photo, 3) TM7 form (completed), 4) A copy of the entry stamp, 5) Payment of the extension fee (around 1900-2500 Baht). It is also advisable to have proof of accommodation, such as the address and contact number where the individual is staying. Note that the TM30 form may not be necessary unless on a long-stay visa.