In the system, a credit note for a purchase invoice is created by attaching a negative credit note to the invoice to be credited.
1. First, create a negative invoice in the system, specifying the amount to be credited.
2. Both the invoice to be credited and the credit note must be in the "approved" state to proceed with the attachment.
3. Navigate to the approved negative credit note, then click on the "Process invoice" button and select "Attach Credit Note" from the dropdown menu.
4. After clicking the "Attach Credit Note" button, a popup window appears where the attachment can be made. Since the credit note is attached to the original invoice, at this stage, the original invoice number to which the attachment is to be made must be known. In addition to the invoice number, the invoice can be retrieved based on reference or recipient information.
5. After this step, the credit note for the purchase invoice is completed, and the status of both invoices changes to "Credited."
