To approve time sheets, navigate to the Time Clock tab and select Timesheet. This will present a list of time punches for the selected date range. You can then click on the "Approve All" button to approve all entries or click on the check mark next to each time punch to approve the entry. Note that approved time punches have a green check mark while un-approved ones are gray.
If you need to make any edits to the time punch, click on the "pencil" icon to make changes.