How to edit submitted time card?

To edit a submitted time card (timesheet), you must first un-submit those time entries. To do so, follow these steps:
  1. Open the Weekly Time Card screen from the side menu > Time & Expenses.  
  2. Select the relevant period and date. The relevant time entries are displayed on the grid.
  3. Click the Show Status toggle in the More menu to view the status of the entries.
  4. Select the entries you want to unsubmit. Click on Actions > Workflow > Unsubmit.
  5. When the entries are unsubmitted, you can edit them as you need to.

Check CORE Help Center for details.