Invoice No.

A unique Invoice No. is required for each invoice.  If you leave the field blank, when you save the invoice, the next available number for the AR Account will be assigned using the Last Document Nbr in Chart of Accounts. 

You may assign the number yourself and the Last Document Nbr in Chart of Accounts for the AR Account will be updated with the value in Invoice No., if the invoice number is greater than the current invoice number stored in Last Document Nbr.