approaches on importing/creating sales orders in EBS 12.2.1 with tax information

Hi,

Looking for approaches on how people have imported/created sales order in EBS that have tax calculated and collected by an external system.  Did you create a 'dummy' item to use to capture the tax amount?  A separate distribution level entry on the  sales order?, etc..

Situation is this:

1) original sales and fulfillment occurs in Non-EBS instance

2) Non-EBS instance generates a csv file week which contains all of the customer info, item sold, sale price, sale tax

2.1) note the "customer" is a distributor/re-seller, the end customers address is used for tax calc/tax jurisdiction (but we don't get the end customers name/info)