If you need to add a new Purchase Order to an existing Placement, go to a Placement record > Finance tab > Purchase Orders > Add Existing Purchase Order.
Look for existing records, or click +New Record if the required record is not listed, then click Purchase Orders.
Complete the New Purchase Order as required by your organization, including all required fields indicated by a red asterisk (*). Click Save & Close to return to the Placement record.
Click again on Add Existing Purchase Order, select the purchase order and click Add.