You can add a purchase order from the purchase order tab or from an order invoice.

Basically, the purchase order (tab) works in all cases, but if you want to send a purchase order in response to an order you receive, you can do it faster from that order invoice.

If you receive an order and want to send a notification to purchase the requested items from your supplier, you can save time and minimize inventory by adding a purchase order from the order invoice, which automatically adds the items that were ordered to the purchase order. You can also send a purchase order from the purchase order tab, but if you want to send a purchase order in response to an order you receive, it is quicker to do it from an order invoice.

Visit Admin > Purchase Order

Go to the Actions tab and click on Add Purchase order.

If you want to send a purchase order to the supplier and there has not been an order (e.g., to purchase items in response to low inventory), you can use the purchase order tab. You can use the purchase order tab even if there has been an order, although sending the purchase order from the order invoice is faster.