This article covers
Why discount items are not being calculated correctly.
Solution
Go to Netsuite and open the Discount Item by going to List -> Accounting -> Items
Check to see if the discount item has a rate associated with it.
We will need to eliminate this rate field and create a discount item.
To do this, create a “new form” for discount items and remove the rate field as follows:
Once a new form has been created, use the new form to create a discount item and provide the internal id of the discount item to support@chargebee.com to map it in ChargeBee.