Thai lmmigration bureau has introduced the use of Thailand Digital Arrival Card (TDAC) to facilitate travelers entering Thailand. 

All Non-Thai nationals entering the Kingdom of Thailand, regardless of their mode of transportation including land, sea and air, must complete a TDAC online.

 Don’t forget to do TDAC before entering the Kingdom of Thailand Compliance will be mandated from May 1st, 2025 onward. 

click here!!
https://tdac.immigration.go.th/arrival-card/#/home