To convert invoices to credit notes / purchases to supplier return:

1.Select the Invoices or Purchases document type.

2.Select the document(s) to convert.

If you need to select multiple invoices, press the Ctrl key and click on each invoice you wish to convert to credit notes.

If you need to select multiple purchases, press the Ctrl key and click on each purchase you wish to convert to supplier return documents.

3.Right-click and select the Documents → Convert to credit note / supplier return option on the context-menu. A confirmation message "Do you wish to continue?" will be displayed.

4.Click on the Yes button to continue. The Credit note(s) will be available as unposted if the Credit note document type is selected.

If this context-menu was launched from the Purchases document type, the Supplier return(s) will be available as unposted if the Supplier return document type is selected.