Is there any way to identify what has been input on a test system over a 4 day period?

Summary:

Customer is testing Payroll 23a. They have run MYCSP and all other tests before 23a applied - rolled them back- and then re-run four days later after 23a has been applied to the system. They are getting an increased number of employees on two reports but say nothing has changed on the system. I am not a technical person - is there a script or anything that can be run to identify whether this is the case? An additional 29 employees have been put on the reports.

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