Tasks in Time Tracker
To track time by tasks in addition to projects use the
project and tasks tracking mode. You can set it on the
Team Profile page.

Select the "Projects and tasks" tracking mode to track time by tasks
To manage tasks use the
Tasks tab in the menu. Manager and co-managers can create a new task with the
Add task button. They can also edit or delete tasks using the
Edit and
Delete links in the task table.

Task list in Time Tracker
To add a new task click the
Add task button. A screen like below appears. When adding a task you can select projects associated with it.

Adding a new task in Time Tracker
Time Tracker User Guide