Once a Timesheet has been marked as ready for billing and then saved, the Timesheet will move from the Pending Timesheets area to the Timesheet Billing area to be processed into an invoice.
In order to remove the Ready for billing selection you will need to do as follows:
Click Interim and then click Timesheet Billing.
Select your required parameters and click Next.
Highlight the required timesheet and click Goto Timesheet.
Remove the Ready for billing selection.
Click Save and Close.
The Timesheet will then revert to the Timesheet Pending area to be amended before processing.