Avalara Best Practice Setup - Client was a long time Sage 50 user with Avalara. They sell machines and take trade ins for the new sale which are refurbished. Standard practice is to invoice the full amount and customer pays the net (of trade in) prior to delivery. When customer sends in trade in, a credit is processed for machine. When Avalara was installed in, client was instructed create two new item codes for the invoice - one was a positive amount and the other was a negative for the same amount. Since the amounts net out Explanation given (murky) was that this was the way Avalara processed the information. Does anyone have a clue as to what the heck is going on? I can't wrap my head around this. Client has the deer in the headlights look when pressed.