I can't edit a paid invoice
You open an invoice and cannot change its amounts, or you see: “This document is paid or has recorded payments, so its financial details can no longer be changed. Cancel it instead.”
Why
Once payments exist, the line items, discount, tax and client are locked, so the figures always match the money that was recorded. The Paid status is also automatic: you cannot set it by hand. It applies as soon as payments cover the total.
What you can still do
- Change notes and details that are not financial.
- Add more payments.
If the invoice is wrong
- Change the status to Cancelled. This is the way to retire an invoice that should not have been sent.
- Create a new, correct invoice. Use the same client.
- Sort out any money already received. It is not moved between invoices for you, so record any refund or transfer in your own accounts.
If you cannot change the status either, open a ticket with the invoice number and what you need to fix.