What immigration procedures should I follow after returning to Thailand on a non-immigrant B Visa?

After arriving in Thailand on a non-immigrant B Visa, you must adhere to specific immigration procedures. It is essential to check in with immigration if you have not done so in the past three weeks. While the TM-30 form was filed by your building during your initial stay on a tourist visa, compliance with the 90-day reporting requirement applies once you are on a non-immigrant visa.