The Task alarms panel is normally docked and hidden to the right of the interface at start-up:

The number of outstanding tasks (diarised appointments) is shown also.
Hovering or clicking on this tab exposes the list of alarms:

The list contains the date/time, task type and text description of the outstanding task.
Double click on the task to open it.
The following buttons are also present:

• Select All: Select all tasks in the list
• Snooze: Turn off reminders for a specified amount of time
• Cancel Alarm: Turn off reminder for selected task(s)
• Clear: Mark the selected task(s) as completed
• Reschedule: Open each selected task for editing
• Contact: Open the contact record associated with the task