There are different ways to create a task.
Inside a Tasklist
A. Beside the Tasklist Name
Click on "+" on the Tasklist.
Type in the preferred name on the new Task.
Then click Create.
B. Next to the completed Tasks
On the very bottom of the list. Click on "+" right beside the "Completed Task"
Type in the preferred name on the new Task.
Then click Create.
From Overview
Click on the green New Task button at the top.
Select the location where you want to add the new task.
Enter the task title and click on Create Task.
From People page
Click on the team member to whom you would like to assign the task.
Click on the Assign tab.
Select the location where you want to add the new task.
Enter the name of the task and click Create Task.
Or you may also click on the + sign button at the top left corner of your screen and click on New Task.
Select the Location.
Enter the name of the Task and click on Create Task
Click on Locate to open the newly created task.