The 'Charge Now' newly added feature will give you the ability to process the payment right away. See steps to follow below:
1. Before making the changes, the Payment Status is 'Scheduled'. Click on the 'Edit' button to pop-up another page.
2. Once the pop-up page appears, click on the 'Charge Now' button at the bottom right side of the page. Then, confirm by clicking 'OK' button.
3. Once applied, the Payment Status in the Subscriptions tab and Payment Details summary will be changed to 'Paid' which indicates that the payment went through successfully.