As a Jinius user you can issue invoices to a company that already exists in the Platform, given you provide all the required information.
You can navigate to the Invoices screen from the left hand side menu:
In order to create an Invoice, switch to the Receivables tab and click the Create Invoice button.
Once you click on "Add New" and then "Invoice", you need to fill in the information as shown below.
If your trading partner has defined Business units, and your invoice refers to specific unit, you may select the related business unit from the dropdown.
By clicking "Add line item" you can add details on the product/service detail you provide along with the cost, tax and the discount, if any.
When you finish adding products/services you can see the total amounts at the bottom of the page and once you are happy with everything, click "Send" to send the invoice to your client!