How can I apply for a marriage visa in Thailand after my non-O retirement extension expires?

The user is seeking advice on how to apply for a marriage visa in Thailand after their retirement extension (non-O) expires while they are currently outside the country. It is suggested that the marriage visa should be applied for from outside Thailand, as one can only apply for a non-O spouse visa while outside the country. Alternatively, they could return on a 60-day tourist visa and then apply for the marriage visa.