What do I need for my first 90-day report with a marriage visa in Thailand?

To complete your first 90-day reporting for your marriage visa in Thailand, you primarily need to bring your passport and a filled-out TM47 form, which you can obtain at the immigration office. It is also important that a TM30 form is on file with immigration. Additionally, some immigration offices may have specific policies, so it's advisable to check in advance.