@Tommy ******
okay this is how it works out,
When you go from a visa exempt or a tourist visa entry to a 90 day non-O visa you don't START your 90 day reporting until you're actually ON an extension that lets you stay here 90 days or more
Neither the visa exempt entry OR a tourist visa with an extension lets you stay 90 days, AND getting that initial 90 day Non-O doesn't add to the days you've been here because you were here as a TOURIST before and now you're here as a person on a Non-O visa
BUT
Even that 90 day Non-O visa doesn't require a 90 day report because you can't be IN thailand longer than 90 days until you get an extension <- AND it's this first yearly extension that you get that they will give you a small paper in your passport saying when your FIRST 90 day report is due
SO until you get your year extension you don't worry about doing a 90 day report
That paper they will put in your passport when you get the first yearly extension looks like this