How early can I apply for a 30-day extension on my TR60 Tourist visa before it expires?

A TR60 Tourist visa can be extended at an immigration office starting 30 days before the expiration date in most areas, while in Bangkok, Phuket, and Chiang Mai, you can apply up to 45 days in advance. The approval for a 30-day extension is generally straightforward, and rejections are rare. When extending, make sure to have necessary documentation, such as proof of address registration (TM30) related to your accommodation.