How do I set up a commercial discount?

In Local management > Company data - tab Accounting info - general ledger account discounts sales you set to which account this should be booked accounting wise.

In Basic data > Customer > Customers (V2) - tab "General" you set the commercial discount.

General tab: On the invoice you see that the commercial discount is set to 10%.

Calculated this gives 15,00 Euro.

Tab lines: discount is only calculated on the white lines (150Euro - 10% = 15Euro).

Suppose you also apply a 5% discount on line level:

Then it is visible here:

and this then gives (150 - 5% (7.5) = 142.5 - 10% = 14.25 commercial discount