When the order is received from a customer for goods to be supplied, the Items, quantities, date of delivery, etc., details are given with Sales Order Number. Later when these goods are delivered, this Sales Order is tracked for the order Details either in the delivery note or in the sales invoice.
The Outstanding Sales Order reports are available in Tally.ERP 9. It is possible to know the order position of any item in the Stock Summary. Separate Sales Order Outstanding report and Sales Order Summary report are also available.
To enable Sales Order Processing refer Enabling Order Processing in Tally.ERP 9.