What are the time limits and expiration rules for extending a Non-O 1-Year Retirement Visa in Thailand?

To extend a Non-O 1-Year Retirement Visa in Thailand, you can present your income statement from the Consulate, which is valid for 6 months. It's advisable to apply when you have 45 days or less remaining before your current visa expires, though some offices may require 30 days or less. Importantly, applying before your visa expires does not affect your expiration date; you will retain your existing expiration date and receive an additional year.