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

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

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

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

The credit note 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 purchase credit note

1.  Go to Purchases and select Purchase credit notes.
2. Find and open the credit note you wish to delete.
3. Select Delete and then confirm the deletion.