To complete a task on the system, navigate to 'Tasks' > 'Processing' > 'My Tasks'/'All Tasks'
Below, the selected task's 'Task Status' is at 'Not Started'.
You can either set this task directly to 'Completed' or begin the task by setting to 'In Progress'.
After selecting the task line click the 'Set Task In Progress' button 
otherwise click the 'Set Task Completed' button 
Completed task lines will grey out with the task status 'Completed'.
