Can I change my visa to a NON-O retirement visa if I am currently on a 30-day visa exempt or a 60-day TR visa in Thailand?

Yes, you can change your visa to a NON-O retirement visa if you are currently on a 30-day visa exempt or a 60-day TR visa, provided you have the necessary documents and the required funds (800k THB) in a Thai bank account for at least three months. It is advisable to address this as soon as possible, especially if you entered on a 30-day visa, to avoid issues with the visa under consideration period. Alternatively, you may enter Thailand on a NON-O retirement visa directly for an easier process.