Answers to your below Queries in blue .
1. We’ve discovered something odd in BC. We had a quote where the customer received a 5% discount on certain items. When we later converted the quote into an order, the customer wanted to change the quantity of some items. When the quantity is changed, the discount rate disappears. Has it always been like this?
Pallavi - System always referesh whenever there is change in qty , unit price , discount, line amount . Becuase if we do not reset the values , old values will be set and it has precedence .
Example :: Qty is 10 , unit price is 10 then Line amount = 100 ; IF qty changed to 12 , and unit price is 10 then line amount should be set as 120. Discount % plays an important role on line amount . Hence it resets and its correct
2. While we're on the topic of customer discounts, we tried using the “Invoice Discount” field in BC a long time ago. It seems very practical when you have an order with many lines, as it saves you from having to apply a discount on each individual line. Unfortunately, that line doesn’t appear on our invoices, so the customers aren’t very happy about it. What is required to make the invoice discount work?
Pallavi - I have calculted invoice discount % as below in sales Invoice
You can check in Invoice Statistics
To get impact of Discounts , you need to setup in Sales & Receivables Setup
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Regards
Pallavi Phade