You can only delete an invoice if it meets all the following conditions:

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

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

• Unallocating the supplier payment from the purchase invoice, or
• Unallocating the credit note from the purchase invoice

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 purchase invoice

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