Once a renter uses a card to pay for something in Wheelbase, the payment processor will retain the information, allowing you to charge the card later by simply selecting it from the drop down box.
Navigate to the reservation
Click on MAKE PAYMENT (this opens up the payment window)

Select PAY WITH A CREDIT CARD
Locate the drop down box that reads ADD A CARD
Click the drop down menu and select any of the cards that have been previously used by this customer

NOTE: Any charges (add-ons, date changes, services, mileage, toll bills, etc.) must be captured on booking prior to charging renter credit card. Any attempts to process payment without supporting line items and/or booking changes/adjustments will prompt the following pop-up;

If you encounter above, please double check by clicking 'Edit Booking' to ensure the amount you are charging has been properly accounted for. Further clarification outlined in below video;