You can edit invoices from the Invoices page, accessible from the Sales menu.
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If payments have been applied to the invoice, you won't be able to change the customer in the Customerfield. You need to delete the payments on that invoice and then edit the invoice to enter a new customer. See Deleting a customer payment.
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To edit an invoice
To edit an invoice
You can click invoices to open them for editing.
In the invoices list, find the invoice you want to edit and click it. The Invoice page appears, showing the invoice details.
Make any changes to the invoice.
To save the changes without sending a copy to the customer, click Save. The Invoice page reappears.
To save the changes and send a copy to the customer, click Email or print or Resend to customer. In the window that appears, complete the fields and click Email or Print. For more information, see Emailing, previewing and printing invoices.
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Need to change a customer's details?
See Editing customer details. After updating their details, to see the changes reflected on an existing invoice (such as a change of address), open the invoice and click Save. The updated address will now show.