There should be a feature to Lock Transactions before a particular date. (obviously, this should be reversible).
This is particularly important after VAT Quarters and Year Ends. Often font desk will make a mistake and go back and try to correct t historically, but they will not understand the implications from an accounting perspective).
This locking would match the functionality in external accounting software. with this feature you could reconcile both the accounting software and Pabau then lock them both, giving you the peace of mind that they will remain correct.