OK, keep me informed.
I'm a little puzzled about this so far, so whatever information you can gather will be helpful.
I think the main problem may be that certain places are calculating "acceptable taxes" to be much higher than they should.
The problem he describes sounds more like "high tax detection work fine"+"ridiculously high tax detection is nonoperational". But I have no idea what the code looks like as far as taxes go.
Details like region names would, obviously, be useful.