Submission window
The TDAC FAQ uses conflicting inclusive-three-day and 72-hour wording. The submission opening calculation is withheld.
How to use
Enter your local arrival date, then complete the declaration on the official government website. Do not enter passport numbers or accommodation addresses in this calculator.
Common mistakes
Enter the date you arrive in Thailand, not your flight's departure date. Use Thailand's local date, which can differ from Korea's.
Frequently asked questions
Is this declaration a visa or entry approval?
TDAC is not a visa and the official submission service is free. Check visa, residence and exemption requirements with the authorities.