Early payment discount - browser version

We are transitioning from AccountRight Desktop to browser version and finding many features not available.

We have a 5% early payment discount for clients, set up in the desktop version, and it has been working perfectly including automatically calculating the discount amount when receiving payment.

We are now trying to use the browser version as my VA has a macbook (AccountRight not available in Mac format without running Windows). We have found that when recording an invoice payment in the browser it does not automatically check the date or calculate the discount. 

On looking at the invoice, the sales terms are not shown nor are they editable to set up the discount. On looking at the customer card in the browser version, there is no sales tab to enter these settings either for existing customer cards. 

Has someone worked out how to find these sales terms settings in the online AccountRight version and how to get the early payment discount to automatically calculate?