@Mauro *******
TM30 must be submitted no later then one business day after you arrive. Your hotel or property owner should have submitted it. The approved TM30 looks like one of these three documents below.
The 90 day report varies depending on the immigration office. Some don't require it, some do. Bangkok Immigration sometimes require it, and other times it doesn't. I recommend going to Muang Thong Thani, Counter A, and ask them if you need to do a 90 day report.
Counter A does the 90 day reports, and would be able to give you the answer.