When generating sales transactions in ESC, such as invoices, quotes and credits, you'll notice that the numbers are automatically assigned to the new transaction. ESC also provides you with the ability to change the starting point of these transaction numbers. To change the starting point of your invoice or quote numbers, head to Sales → Set Invoice Counter.
Enter the new beginning number and then click OK.
**Never change this number to one previous than the current number. This could cause ESC to recall previous records, rather than creating new ones and assigning an available ID.