Go into Purchase Order Receipt of Invoice and enter as negative the amount over invoiced.  Then you would need to go into AP and adjust the resulting invoice to zero.  Make sure no item has a Backorder quantity.  You might need to us DFDM to change the status to closed once everything is in balance

Can you provide a bit more detailed.

Is the qty ordered and received correct and we invoiced more than received?

You do need to create a transaction that will reduce the number of items invoiced to match the number ordered/received.

The answer depends on what qty is correct- the number invoiced or the qty ordered/received.

Thanks much

Indeed.  Over invoiced could mean the receipt of goods wasn't done correctly.  (Receipts entered directly in the IM module are not recognized by the PO).

The quantity ordered and received is correct.  The invoiced quantity is incorrect.  Thanks.

What is DFDM?

Data File Display and Maintenance

It's under Library Master / Utilities.