Client invoice Discount & Extra charge
From Protemos Wiki
Client invoice Discount & Extra charge update: https://cloud.protemos.com/client-invoice/discount?id=XXXX (replace XXXX with the valid project number)
On this page, you can enter a discount and(or) an extra charge for the invoice.
You may add them whether as the percentage or flat amount.
To do that, select the corresponding extra charge and discount type (Percentage or Absolute) and enter the requred value:
Press "Save" after entering, and you'll go back to the Client invoice page.
Note: Invoices with zero or negative amounts cannot be linked to payments.
