Plan enough time for returning your rental car. Depending on the selected refueling arrangement, you must fill up your rental car accordingly. Have everything documented upon return. The deposit will usually be refunded to you within a few days, provided the car was returned in the same condition.
24 hours before rental is free of charge during Driveboo's opening hours. This allows you a particularly flexible booking. Should the travel regulations for Cuba change, you are on the safe side.