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Typically, you will use this method to submit complete timesheets. However, you can also use this method to enter data in timesheets that have already been submitted. #zzz Is that correct? If they have been submitted, it will enter the new data?
For example, a contractor might have worked an additional shift in a day, and you want to enter that information into his or her timesheet. If so, you would select the Add data to existing timesheets checkbox on the Upload Timesheet Data screen.
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