sale credit note

SOLVED

Hi,

we agreed with one our client to allocate a credit note, it happened when we have already recorded related sale invoices. They send a remittance and applied the agreed credit note. When I want to "record a payment" for the invoice, I try to add credit note. It created and shown paid with the related invoice reference number. But I can see again my invoice is already unpaid and I can not see the exact result of the created credit note on reduction the invoice amount.

could anyone help me!