Looking at the documentation what I see is the thing that happen after you have timesheets set up and start entering time.
The way I understand the question is how to do you get to that point.
So
Create time periods, set them open.
Set projects and resources open for time entry and make the track mode Clarity
Give resources navigate timesheets right (they should have enter time for themselves by default if not give it)
This allows to see the timesheets link and to open the the list of timesheets, and open individual timesheets.
Assign resources to tasks and set them open for time entry and also the resources open for time entry in team > Staff member properties
This allows the resources to see the task they are assigned to on the timesheet when the planned time frame is so that they can enter time and SUBMIT the entered time.
Jerin_Sebastian please educate me. If that, too, is covered in the documentation educate me where exactly.