1. Click the item in which you would like to add a due date.
2. Click "Set Due Date" on the detail card on the right side of the page.
3. Click the appropriate date on the calendar. If this item repeats each month then you can click the "Repeat every month" checkbox.
4. Click the blue box that says "Set Due Date".
*Now you will see the due date displayed in the line item. If you select to have it repeat you will also see it in future months as well.