Best to be on good terms with the Immigration, so if you have been in Thailand 90 consecutive days, then do the report.
And bring a copy of the TM30, it makes it easier at the immigration office.
I always ask for a copy of the TM30 when I check in at a new adress, making it much easier for the landlord / reception to make a copy when theymake the report, than having to find it again 80 something days later.
( And you thereby remind the reception to make the TM30)