The ETA has to be filed digitally before travelling to Thailand and you can only travel after approval. The (new form) of TM6 has to be made after arrival in Thailand.
I always get ours approved within 1-2 hours, only when rejected then it takes longer. This happens if you travel around thailand and have another accomodation outside your province where you made the first 90 days.
A tenant can‘t file for himself on the online website without agreement of owner. I jd to ask my landlady for her thai id and housebook etc. and register a new account so I can file all my tm30 s myself
May I ask what Visa you have? When we did our first one year EoS the immigration also did our first 90 day report automatically we didn‘t even noticed first. ☺️