This guide will show you how to remove parts discounts from Sales Ledger accounts, this process is done through the Marketing Module on Navigator.
First you will need to access the Marketing module > View Customer / Prospect.
Once here you will need to search for the Sales ledger account for the customer in question, this will need to be searched in the "Other" search field.
When in selected Customer, click the Profiles Tab and select the Parts/retail Profile.
In Pricing field remove or add the discount in the from stock tab as shown below, when happy with the changes click Save and close.