Replace an issued invoice

An issued invoice can't be edited or deleted, because it's a financial record. If it's wrong, issue a new one that replaces it.

Steps

Open the job and choose Generate new invoice in the invoice card. Or open Invoicing, choose New invoice, tick Include already-invoiced jobs and pick the job.
The new invoice starts from the job's services and labour, not from the old invoice. Put the lines right, and add any parts again.
Choose Generate invoice.
In the Issue this invoice? message, tick This replaces invoice followed by the old invoice's number.
Choose Generate invoice.

The old invoice stays on file, marked Superseded by the new invoice's number.
A superseded invoice can no longer be marked as paid.
If you don't tick the box, both invoices stay live. Only do that when the second invoice is for extra work.
An invoice that's been marked as paid can't be replaced. There's no This replaces invoice box, and Generate invoice issues a second invoice straight away.
Replacing an invoice doesn't create a credit note. If you're VAT registered and the old invoice is in a VAT return you've already sent, check with your accountant.
Send the customer the new invoice so they know which one to pay.