If you prefer not to send the invoice via email but want to send it by post, for example, that is also possible.
To mark a sales invoice as sent follow the steps below:
Navigate to Sales in the left-hand menu;
Choose Sales invoices;
Select the invoice(s) you want to mark as sent;
Choose Select an action and click Send;
To mark 1 invoice as sent click on the To dropdown and select Mark as sent
To mark multiple invoices as sent click on the button Mark all as sent
Click Send;
The invoice(s) are registered as sent and are now booked in the administration