There is no such thing as deleting an invoice once it is posted. You must go into Purchase Order and do a Return of Goods with Invoice, post and then do a correct Receipt of Goods with Invoice. Read up in the Help files. I would say to read the manual but there is no such thing anymore (many of us could just cry)

The problem is that there was an Invoice number associated with the PO when the original Receipt of Goods was posted. Now when I go into PO>Mat Req/Return>Return of Goods Entry and try to Return using the same PO and Inv #'s I received with I get an error message.

And that error message would be what?

Hello Jglobe,

When doing a Return of Goods with an invoice number, You will need to use a unique (different) invoice number.  The Return of Goods with invoice number will generate a negative invoice in A/P, so it needs to have a different number in order for it to be able to post into A/P.