Sorry, posting a question gives me limited space, and I was not able to explain.

I have no problem tracking an invoice back to the original PO. (click on the linked transactions.)

What I am asking is: how do I track a PO down to the invoice it's linked to?

From the Purchase Order, I can click on "1 linked transaction" to take me to the bill that I created from the PO.  No problem.

However, from the bill, I can only get back to the PO.  There is no way to find out "What invoice has this billable expense on it?"

At best, I can pull up the report you suggested, and look at the dates for bills, but I can't find a direct way to start with a PO and find out "what invoice is this linked to?"

Obviously there is a link, because I can start with the invoice, and navigate my way back to the PO, so why can't I do it in the other direction?

Thank you.