Can I perform my 90-day reporting at a different immigration office in Thailand?

You must complete your 90-day reporting at the immigration office corresponding to your residential address, which in your case is Chiang Mai. You can do this in person within 15 days before the due date up to 7 days after the due date. Alternatively, if you have previously reported in person, you can complete the reporting online during the same time frame. Some immigration offices may allow submissions by mail, so it’s advisable to contact the Chiang Mai office for confirmation. Additionally, if you change your address while in Thailand, you must report it within 24 hours.