Only admin users can access the invoice section. You can view and download invoices from SafariOffice and you can also set a separate email address
Viewing and Downloading Invoices
Go to Settings > Subscriptions & User Accounts > Invoices
Here you can view the invoices for your subscriptions.
You can also download them with the download link in the last column.
Set specific email addresses for Invoices
You can set a separate email address for the invoice to go to in your Billing Information.