What are the steps for moving from Bangkok to Chiang Mai if I currently hold a COVID-19 extension?

To move from Bangkok to Chiang Mai while holding a COVID-19 extension (not an amnesty visa), you should first check your passport for the relevant extension stamp. If you have the necessary stamp indicating you've moved from 'under consideration' to 'extension of stay', you can proceed with your move. Upon arrival in Chiang Mai, you or your landlord must submit a TM30 form (notification of foreigner in residence) to the local immigration office, and possibly a TM28 form if you are changing your address. This will allow you to manage future extensions in Chiang Mai.