Just as a.poinr of interest, 90 online notifications. Do they take into account a trip out and return to country? Example, your normal due date is 1 July and you would expect to see a notice shortly before. You do a short international trip and return on 1 June. Would I expect no notice for 1 July but expect one for ~1 September?
TLDR : Answer Summary
When leaving Thailand, your count for the 90-day report resets. Thus, if you normally expect a notification around 1 July but travel outside Thailand and return on 1 June, you will not receive a notice for 1 July. Instead, your new 90-day period starts from your return date, so you can expect the next notice around 1 September.