Sage 100 - How to Adjust an Invoice in Accounts Payable (formerly MAS 90 / 200)

How do you adjust the vendor name.

I processed and AP invoice under the wrong cuatomer. how can I adjust that?

Is an import to create negative invoices?

How to I edit AP invoices that were transferred?

How do you adjust an added fee?
So you receive an invoice and are entering it but there's a fee on the invoice but not in the system under lines. Can I add the fee in a line while I'm entering the invoice?

How do I adjust an invoice to zero from a previous year? Can I post the transaction in the current month?

How to delete a duplicate invoice in Sage 100?