To start use the side menu and clicking Recurring Invoice:
You will then be redirected to the Recurring Invoices page:
To add a new recurring invoice click the blue "New Recurring Invoice" button, you will then be taken to this page:
Here you will choose the client you are sending the invoice to, then the frequency of the recurrence of the invoice, then which product is being sold and how many of the products are being sold, after that enter the subject of the invoice, the start and end of the recurring invoice, then the status of the billing then lastly select whether VAT is included or not. Then click the save button. You will then be taken to this page:
You will then be shown the information of the invoice where you can change or update the information by using the edit button or you can erase the invoice by using the delete button. Near the bottom of the page, click the blue "recurring invoices activities" to track the status of the invoice.