How do I file a TM30 and 90-day notification if I change my address in Thailand, and can these be done online?

To file a TM30 after changing your address in Thailand, your landlord is typically responsible for filing it on your behalf. However, if necessary, you can file it yourself by providing the required documentation, including your lease agreement and the landlord's identification. Once the TM30 is filed for your new address, you can file your 90-day report online. Note that your 90-day report due date remains unchanged despite moving; it continues from your initial entry into Thailand.