What are the steps to extend a 60-day visa exempt stay in Thailand, and when should I apply for it?

The user is seeking advice on extending their 60-day visa exempt stay in Thailand. They want to know if they will encounter issues with the extension, when they can visit the immigration office to apply, and the best way to proceed with the extension process. Community responses indicate that extensions can typically be applied for 30 to 45 days before the current visa expiry, with some variations depending on the location. It's recommended to apply a week before the expiry and to be mindful of public holidays that may affect processing.