What documents and fees are required to extend a 30-day non-visa in Jomtien, Thailand?

To extend a 30-day non-visa in Jomtien, you will need your passport, a copy of the data page and your current entry stamp, the TM.6 departure card, a filled out TM.7 application form, information from your hotel (address and phone number), one passport-sized photo, and the fee of 1900 baht. Additionally, submitting the TM30 form might be necessary.