Is it possible to show status of entries in Time Card?

Yes. If you want to check the billable status of time entries without opening their details in the Time Card screen, you can select the Show Status option from its More menu. Cells with non-billable entries display NB, while all other entries are billable. You can also see the billable and other status of the time entries by choosing the Show Memo option from the More menu. The Memo dialog displays any memo attached to the time entry as well its status. Check CORE Help Center for details.