You wish to modify certain elements of an invoice that you have already created. Let's see how to proceed with an invoice without payment and an invoice that has been paid by the customer.

Invoice pending payment:

See you in “Sales” -→ “Invoices” and click on the invoice you want to modify. Click on the button "Actions” at the top right of the invoice, then on “Edit invoice”. Once the modification is complete, click send to customer. The customer will receive a notification email accompanied by the new invoice.

Invoice with payment:

See you in “Sales” -→ “Invoices” and click on the invoice you want to modify. Click on the button "Actions” at the top right of the invoice, then on “Edit invoice”.

• If it is the modification of a service, click on the blue pen to the right of the service,
• Or if it is a service addition, click on “Add a service”

Once the modification is complete, click send to customer. The customer will receive a notification email with the new quote, which he will have to accept again, and you could delete the previous one.

Note: If the balance due varies positively, send the invoice to the customer and a request for payment will be sent to him. If the balance due is negative, you should therefore pass the rest of the invoice to expense with the reimbursement label.