When the order is placed with the suppliers for the supply of goods, the Items, quantities, date of receipt etc., details are given with the Purchase Order Number. Later, when these goods are received, the Purchase Order is tracked for the Order Details either in the receipt note or in the purchase Invoice.
The Outstanding Purchase Order reports are available in Tally.ERP 9. It is possible to know the order position of any item in the Stock Summary. Separate Purchase Order Outstanding report and Purchase Order Summary report are also available.
To enable Purchase Order Processing refer Enabling Order Processing in Tally.ERP 9.