What is the process to extend a 60-day visa to 90 days in Thailand, specifically in Jomtien?

To extend your 60-day visa to 90 days while in Jomtien, you need to visit your local immigration office. Bring your passport and the TM30 form from your landlord or hotel. The extension fee is typically around 1900 baht, but some offices may have different requirements, so it's wise to check locally. Generally, you can apply for an extension during the last week of your entry stamp. Arriving early at the immigration office can expedite the process.