How can we extend our OA visa for another year after leaving Thailand?

The OA visa allows you to extend your stay in Thailand by exiting and re-entering before the visa expires. You need to get a stamp upon re-entry to secure the next year's extension. It's not necessary to provide proof of funds upon your return; this requirement usually applies when applying for a new visa. Ensure you do this a few days before the visa's expiration, and remember to obtain a re-entry permit if you plan to leave while the extension is valid.