Hi Danfoot
If it as attachment for the customer to view as the Self Employed product does not have an in invoice link for attachments.The best option would be to go to the invoice list section(on the left hand side menu) select the drop down in the action column>click export as a pdf>save it to your computer>create an email and add the pdf and the other job sheet to the email and send to your customer
Alternatively you can in the invoices section select send invoice and in recipients email address select your own,then add the attachment to the email when you receive it and forward it on to your customer
Emma