Before editing an invoice

You can only edit an invoice if it meets 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

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 purchase invoice

1. Go to Purchases, then Purchase Invoices.
2. Find and open the invoice you wish to edit. 
3. Select Edit.
4. Edit the information needed and select Save.