what probems would this create?  
 
 
tools bought for a job are entered on PO.  6% sales tax is charged.  To make the PO match the vendors invoice and to expense  the sales tax to the job costing I enter a negative 6% in the discount field.  
 
We do not use AP-C.  All vendor invoices are paid thru vouchers.  
 
I have alway lamented that the sales tax expense did not get to jobcosting,  and does not showup on PO-I-E  
 
THANKS,