How soon do I need to submit the TM30 to immigration upon returning to Thailand?

Upon returning to Thailand, you typically have 24 hours to submit the TM30 form to immigration. However, this can vary based on individual circumstances and the specific immigration officer you encounter. In cases where travel distances are significant, officers might extend the deadline to 48 hours. For ease, consider using the drive-thru service at the Phuket immigration office, which has been described as quick and efficient.