Advise the resource(s) or user(s) that they need to submit the timesheet from the previous time period first. Once they submit the timesheet from the previous time period, then the timesheet for the current time period will be displayed.
If the timesheets in the previous time period do need to be submitted, the time period could also be closed, then the current time period would display.
To close the time period:
- Go to Administration->Project Management->Time Reporting Periods
- Check the check box next to the Time Period(s) to be closed
- Click the 'Close' button