Good morning John; Once a timesheet has been submitted, it needs to be recalled before it can be re-opened and time entered. In PWA, in the MyTimesheets window, the Status column will show Approved for a previously submitted timesheet. To Recall the timesheet, click on the timesheet row you wish to recall. In the upper left, the Recall button will now be available. Click the Recall button.
Once it has been recalled, the timesheet can be edited and submitted following the normal process.