Display and Change of Values in Nota Fiscal in Inv. Verif. (MM) 
Via the push button Nota Fiscal on the item overview screen, it is possible to enter the Nota Fiscal edit mode. This mode allows you to view the Nota Fiscal and to perform changes.
Note that all fields can be determined automatically. The Nota Fiscal dialog integrated in Invoice Verification allows changes for the following fields.
You cannot change values for price, freight and total, because price is calculated from value and quantity and freight and total are derived from the invoice. Changing these values is only possible via the invoice verification screen.
All changes at nota fiscal level are lost if you change the invoice data in Invoice Verification after changing Nota Fiscal data. In this case, the system raises a warning.

Changes are only possible in the invoice verification. You can not use the Nota Fiscal Writer to change Notas Fiscais created by invoice verification, except for the observations. If the original MM document has already been canceled, you can cancel the nota fiscal that goes with it using the Nota Fiscal Writer.