When adding an invoice, the invoice number is automatically incremented from its previous number.

To reset the last invoice number used:

Go to the miscellaneous screen under Setup




1. In the miscellaneous screen is the invoice default section
   
    
   
   Now, notice the Reset Last Invoice Number field. The number on the field is the invoice number of the last invoice created in the Invoice System.
   
   This means the when you add a new invoice, the invoice number would be 10002 based on the Last Invoice Number above. You can reset by changing the field. For example, if you put 10006, the new invoice would be 10007.
   
   
2. Enter the new invoice number in the field. This new invoice number will be the initial number to be incremented when adding new invoices.