You need Time permission to view and edit the timeclock and Payroll permission to be able to view pay rates. If you don't have access to this module, ask someone with Managers permission to update your user permissions
Editing
Click on Time then Timeclock then Staff Clocks
Click on the start/finish time you are wanting to edit under the When In/When Out sections.
Edit the date & time to your desired start/finish time
Then click the OK button