Can I extend my retirement visa 2 months or only 30 days before the due date in Thailand?

There seems to be confusion surrounding the rules for extending a retirement visa in Thailand. A new service claims that extensions can be done up to 2 months before the expiration date, while another source states 45 days. Traditionally, many expats believed the limit was 30 days. It is advisable to verify with the Chiang Mai immigration office for accurate and updated information.