We use Projects Billing and also interface with Vertex for our sales tax calculations. Is there a w

Right now all items are taxed unless the customer is set up as a Tax Exempt customer.  We have certain scenarios where tax should be charged (example installation) and would like to use an inventory item code (or something of the sort) to help with the taxability of the lines.  Does anyone know how this could be accomplished?  Right now, we have a tax specialist looking at each line and before the invoice interfaces over to AR and marking each specific line as exempt if tax should not be charged.  We would like to have a more automatic process put