Where Can I File My 90 Day Reports in Chiang Mai?

In Chiang Mai, you can file your 90 day report through the following methods: 15 days before the due date by mail via Post Office, online 15 days until 7 days before the due date, and in person at the Immigration Office from 15 days before until 7 days after the due date. For the location of the Immigration Office, refer to the provided map link.