Data point and question: First 90 day reporting (TM47?) in Jomtien/Pattaya area was successful. And I even did it online, so I have not physically entered the immigration office yet.
I registered for an online account last week. Even though I have until beginning of December to submit the 90 day, I submitted my 90 day reporting on the website Monday, nice and early because I thought I would need the extra time for processing or going in person due to an online denial. However, on Thursday I got the approval email.
Question: The email now says my due date for the next reporting is February 18. So by doing the reporting early, I end up moving up the date up for my next reporting, thereby causing me to do more 90 day reportings during the course of my one or two year stay?
TLDR : Answer Summary
The user successfully submitted their first 90-day report online in Jomtien, which resulted in their next reporting due date being advanced to February 18, following the approval of their early submission. Several comments confirm that submitting an early report resets the 90-day reporting cycle. While this may lead to more frequent reports during a stay, concerns about this were downplayed by other users.