Hi,

To add PO to Bill using auto complete, you need to make sure:

- PO status in Purchase Order or Locked.

- PO invoice status is To Invoice or Nothing to Bill.

- Make sure to select the vendor first in Vendor Bill and the PO vendor is the same of the selected one.

Thanks

Always worked for me. Check that the vendor is the same (Not a contact or any such mistake). Make sure the PO is confirmed.