Follow these steps to create a new timelog:
- Click the Main Menu.
- Go to the Projects tab. 
- Select the Timelogs module.
- Click the +Add Timelog button.
- Fill in all the mandatory details.
- Click the View full form button.	- Enable the Is Billable radio button to make the timelog billable.
 
- Click Save.
To know more about Timelogs, click 
here.