How do I apply for a 30-day extension on my visa exemption in Thailand?

To apply for a 30-day extension on your visa exemption in Thailand, you cannot use the E-extension system online. Instead, you must visit the immigration office in person. The fee for the extension is 1900 Baht, and you must ensure that your accommodation is TM30 registered. Take signed copies of your passport detail page and your entry stamp. Some areas, like Krabi or Hua Hin, offer a one-stop service for easier processing, where you only need to provide your hotel information and passport.