You can only edit a credit note if it meets all the following conditions:

• The credit note is unpaid
• The credit note has no allocations
• The credit note isn’t on a VAT Return

If the credit note has allocations, remove them before editing it by:

• Delete a refund allocated to a credit note, or
• Unallocating the credit note from the sales invoice

If the invoice is on a VAT Return:

• If it's included on a draft VAT Return, delete the VAT Return before editing the invoice
• If it's included on a submitted VAT Return, you can't edit the invoice. Instead, reverse the sales credit note

1. From Sales, choose Sales credit notes.
2. Open the invoice you want to edit.
3. Select Edit from the right panel.
4. Change the relevant information and Save.

• Delete a sales credit note (UK)
• Delete a sales credit note (IE)