The outbound flight information isn't a mandatory field. You can leave it bank.
As for purpose, choose Other: Living in Phuket (or whatever you want to write, you can write anything). Don't forget to write your visa number on the form.
In my last entry, which was the first after the introduction of the TDAC, I chose Other: Working remotely from Thailand. I'm on a DTV granted on a remote job basis.
ohhh, sorry. I now realized "TT" means Thai Tag 😅 In Korea we used TT (or ㅠ or ㅜㅜ if using the Korean keyboard) to express sadness, so I got confused. My bad.
Participante anónimo enforcing the law should be always a priority. But the point is that not everybody living here needs to pay taxes. Why? Because if you don't remit any money, you're not subject to pay any income tax. This might sound impossible for people on visas that do require the holder to remit and keep money in Thailand, such as the retiree visa. But for most of the DTV remote workers category people, we don't remit money here. In my case, I don't even have (nor have ever had) a Thai bank account, for instance.
while having a bank account is not allowed on a DTV, either being married to a Thai national or owning a condo makes you elegible to have one, according to the reports