Do I need to notify immigration immediately after changing provinces in Thailand, or is this addressed during my 90-day report?

When you move to a new province in Thailand, you are required to notify the local immigration office by filing a TM30 form within 24 hours of your move. This is separate from your 90-day report. Some provinces may have restrictions that do not allow online 90-day reporting until you have applied for an extension in that province, so it's important to confirm the rules with your new local immigration office.