How can I create Inward Purchase Order?
Inward purchase orders are those received by a company for its goods and/or services (sales ledger).
You can create inward purchase order, First of all you have to enable the option:
Go to Setup > Configuration > Inventory Setting > "Enable Inward Purchase Order".
You can see the inward purchase order in transaction. Go to Transaction > Inward Purchase Order.
Fill the details related to inward purchase order.
If you want to add "Service" and "Other Charges/Discount", you can add by clicking on button "Service" and "Other charges/Discount" respectively.