Every Home and Cleaning is unique. If you finish the tasks on the Client's to do list with time remaining in the service, use your best judgement on how to make the Client happy. Clients generally expect that Homekeepers stay and do their best for the full cleaning time.
Most clients do not believe you can "finish" a cleaning in the shorter times booked through TIDY. For example, those in the Army have noted that they would spend 12 hours on 1 room to get it clean. If you leave early, and the client complains, you may have a large penalty, so leaving early carries risk. Ultimately, it is up to you, but we recommend being aware of the risks.