AccountancyManager has a feature to view all your deadlines generated from your tasks. To access this, go to Tasks > Deadline Calendar. 

The calendar will show all deadline and gives the option to select the task in blue to see full task detail. 

You can switch between viewing by Deadline or Target Date in the top right.
You can also view the Deadline Calendar for other staff users using Staff Deadline
The arrows in the top right allow you to scroll through months.