The Additional Charge dialog appears.
43. Click in the Name text field and enter a name for the new Additional Charge.
54. Click in the Description text field and enter a short description of the new Additional Charge.
65. Click the Allow Negative Price per Unit for Issuing Credits checkbox, to put a check in it.
This enables users to enter a negative or positive amount in the price field when adding this charge to Shipments or Invoices.
76. Complete the Additional Charge dialog with information specific for this charge.
If credits will be applied to taxable items or services, you may also set credits to Default to taxable. This will reduce the total taxes on an invoice that includes credits.
87. Click OK.
Editing an Additional Charge