Apploye's Timesheet Edit feature allows you to change the project and task name, of existing timesheets.
N.B. Please keep in mind that you can't change the time of the timesheets. You may delete a specific time from timesheets using the Timesheet Delete feature.
How to edit the timesheet:
Go to Timesheets > Daily, and hover over the timesheet that you want to edit. Now, a clock icon will appear. Click on it to edit this timesheet.

Now, a pop-up will appear. Now, change the project/task and give a reason for the change.

After typing the reason, click on the "Update" button to save the changes.
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If you have admin access, you can go to Reports > Manual Time to view the edits done by employees.