Click Discount, Shipping or Taxin the Sales Order Snapshot. See Sales order snapshot
Specify a numerical discount rate in the Discount Rate field. The
number is automatically changed to a percent. For example, "50"changes to "50%".
If you specify ".5", the value changes to ".5%".
The amount is automatically calculated.
Specify the cost to ship the sales order in the Shipping field.
Specify a numerical tax rate in the Tax Rate field. The number is automatically
changed to a percent. For example, "50" changes to "50%". If you specify ".5",
the value changes to ".5%".