How can I convert my Non O Multi-entry visa to a one-year stay with 90-day reporting in Thailand?

To convert your Non O Multi-entry visa into a one-year stay with 90-day reporting, you need to fulfill certain requirements. You must deposit 400,000 baht in a Thai bank account in your name for at least two months prior to applying for an extension based on marriage. Additionally, visit your local immigration office with your Thai spouse to gather the necessary documents, such as photos and copies. Note that the current situation may limit your ability to exit and re-enter the country every 90 days, so consider applying for a yearly extension or a 60-day family visit extension, which doesn't require proof of funds.