What is the earliest date I can apply for a yearly extension on a Non-Immigrant O visa for being married to a Thai citizen?

The earliest you can apply for a yearly extension on a Non-Immigrant O visa, which is granted for being married to a Thai citizen, typically depends on the date of your entry stamp. Generally, applications can be submitted up to 30 to 45 days before your permitted stay ends. Some immigration offices might allow you to utilize the visa until the last entry date before requiring an extension application. It’s recommended to check with your local immigration office for specific rules.