How can the due date of an invoice be changed?

You can simply change the invoice due date by replacing the initial invoice. In order to do this proceed as follows:

1. First of all open the transaction and click on details of the invoice. 

2. Click on Actions > Replace:

3. Change the due date of the invoice. 

Please note with the invoice replacement you can also change the prices and invoice details. Once the invoice is stored a new invoice will automatically be created. However, the invoice will not be automatically sent to the customer.