In your Timesheets, you can easily mark time entries as billed or not billed. This comes in handy when you're creating time reports for client invoicing, billing or payroll.
To mark time entries as billed / not billed, please follow these steps:
Go to Timesheet and create a report.
Select the time entries you'd like to mark as billed / not billed.
Click on "Mark as Billed" / "Mark as Not Billed".
You'll see your total time billed at the bottom of the Timesheet report along with all the totals.