Setting Invoice Scheme With SenangUrus ERP you can configure the format for your invoice number. To configure go to Settings -> Invoice settings Click on Add and select a scheme format. Format can be  XXXX  or  -XXXX You can also provide a custom prefix, invoice start number, number of digits in the invoice number. The preview box will display the preview according to the chosen option. You will need to set a default invoice scheme for a business to use it.