It is not technically possible to ‘make up’ for appointments as those transactions will become a part of yesterday’s end of day report.
The reason is simple: it’s irrelevant for Treatwell POS on which day an appointment lies in the calendar - Treatwell POS tracks the checkout of an appointment (and other transactions) in the very moment it’s carried out, unalterably saving time. So, if you check out yesterday’s appointment today, yesterday’s end of day report will of course remain unchanged. That transaction will be part of today’s end of day report, the particular day then, the checkout has been carried out in Treatwell POS.
In order to work properly and compliantly you should keep that in mind and carry out any business transaction immediately and on the same day.