The Digital Arrival Card (DTAC) requires departure information. Date of departure mode of departure, flight number etc. Should imagine it’s a requirement.
I entered Thailand today. Two previous visa exempt entries already this year,23 days each time. I use my Thai wife’s address for the DTAC and in the drop down box for accommodation I click other and type ‘Staying in family home’. Reason for visit I click holiday. Enjoy. You have no worries about entering Thailand🍺🍺