To create a new invoice copying the details from another invoice:-
First you will need to open the Invoice form.
This can be done by choosing one of the following methods:
•Click on the 
toolbar button or
•Select Forms->Invoices from the drop-down menus or
•Click on the 
icon on the left-hand browser pane of your database form.
Select the invoice that you wish to copy from the Invoice Browser.
Use one of the following methods to copy the selected invoice:
•Click on the 
toolbar button or
•Select Record->Copy from the drop-down menus or
•Hit the F3 shortcut key.
Fill in the details of the new invoice. More help on this can be found in the Invoice form topic.
Save any changes you have made by using one of the following methods:
•Click on the 
toolbar button or
•Select Record->Save from the drop-down menus or
•Hit the F9 shortcut key.
When saving a new invoice, the update ingredient costs dialog appears and asks if you would like to update ingredient costs. This is the only opportunity you will get to update the costs from this invoice.
NOTE: To cater for suppliers recycling invoice numbers, the program allows you to enter the same invoice number more than once for the same supplier. Take care you don't enter the same invoice twice.