Customer Transaction Report

Since we have just converted from SagePro ERP to Sage 300 ERP, our auditor is looking for a report that proves customer transactions for the month tie to the amount that was posted to the General Ledger.  I have run the Customer Transactions Report six ways from Sunday and can not get the activity for the month to include Customer Discounts taken for early payment.  As a result the total change shown on the customer transactions report is not the same number as was posted to the Accounts Receivable account in the General Ledger.  Has anyone else had this problem and how do I get around it?  I can't believe something this basic does not work.