https://help.tallysolutions.com/docs/te9rel60/Reports/Display_Inventory_Reports/Purchase_Order_Book.htm

Purchase Order Book

A Purchase Order is raised when there is a request for material.  Purchase Order Book displays  the list of all purchase orders. You can view a summary  of all the purchase  orders till the date of last order entered.

To view Purchase Oder Book

     Go to Gateway  of Tally> Display Inventory  Books > Purchase Order Book. The Purchase Order Book is displayed  as shown below:

     Drill down on a particular month to view the List of All Purchase Order Vouchers.

Note: You will get this option only if you have set the option Enable purchase order processing to Yes under F11: Features (F2:Inventory)

To view the monthly summary

1.    Click N: Auto Column.

2.    Set the Periodicity as Monthly.

3.    Set the option Show Total? to Yes.

The Purchase Order monthly summary will be displayed for the selected period.