When should I apply for a 30-day visa extension in Thailand after receiving a 60-day stamp?

A traveler arriving in Thailand on a 60-day visa stamp can apply for a 30-day extension at various immigration offices. Generally, applications can be made when 30 days or less remain on the current stamp, while some offices might allow applications up to 45 days before expiration. However, places like Jomtien, Pattaya, Koh Samui, and Koh Phangan typically require you to apply only during the last week of your visa validity. It's also important to complete a TM30 registration within 24 hours of arriving in Thailand. Travelers are advised to check specific local immigration rules to avoid complications.