Customer invoices not taxable under certain amount

 Hi,

I need to build a rule where sales transactions with special customer classification is set and transaction amount is under a certain amount.

I want to put this in stage tax applicability so that the TRX becomes "NOT TAXABLE".

Has anybody done this before?

The part with the customer classification shoukd be no problem. I wonder if I can check a transaction amount before determining the tax.

This is for invoices coming from OM, so I also have no problem to set a classification or anything elso there that I can use later with the tax engine.

Best regards and thank you in advance,