Go Ask the person who's Signature appears on the Notice Promulgating the Destination Thailand Visa (DTV) into Existence on 15 July 2024 = Thailand's Prime Minister and Interior Minister!
As published in the Thai Royal Gazette and also the signed copy:
For planned and intended Departure Date Leaving Thailand, just put the same date as your Arrival Date into Thailand, then you do NOT have to fill in Any Thailand Address detail information on the TDAC Website