To change the invoice number or invoice date of a Closed Invoice in MarginEdge go to the Orders Menu > Orders Sub-Menu and select the invoice you would like to edit
Here you'll see the invoice number and the Invoice Date on the Topi of the screen
You can edit the invoice number by clicking on the number itself and writing the invoice number you would like to see.
If you click on the invoice date you'll see a calendar pop-up where you can select the invoice date you would like reflected
Check out this video on making these edits to your invoices