Your landlord or hotel has to register you within 24 hours of you residing within the domicile on the TM30
For the 90 day report it’s the TM47
For the 90 day report on your initial you can either go In person or send in via snail mail
On the second 90 day submission which can be completed 2 weeks early you can do it online
What is initial
Initial is initial
Initial is also anytime you return from an international trip…
After an international trip everything starts over again your landlord/hotel has to register you within 24 hours of residing within the domicile…if in bkk they allow you to do short in country trips which don’t require tm47 updates (renters only hotels will do it automatically every-time)…if not in bkk check the standards of your immigration office