Quote or Invoice Number
            Quotes and Invoices are numbered in sequence, and the Number is generated automatically by the system in the format: 
YYYY-ID, where YYYY is the 
current year and ID is a 
    zero-padded Quote or Invoice ID stored in the account settings. The Quote or Invoice ID is 
automatically incremented by 1 at each new Quote or Invoice creation.
            Example: 2016-0009, 2016-0010
            The Next Quote or Invoice ID can be modified in the Sales Options menu in the web account, 
Quotes or 
Invoices tab.
    
    
Note: Purchase Orders and Packing Slips also use the automatic numbering scheme. However the Next ID is not modifiable in the Options.