TaskBook: Adding tasks to calendar automatically

In order to add tasks to calendar automatically, You have to change settings.

1. Settings

Select "General" in Settings and turn on "Auto Event Generate" switch.

2. Adding Tasks to Calendar Automatically

When you decide due date of some tasks, they will added to calendar.
When you drop a task to "Planned",  The Calendar to decide due date will pop up.

The task has been added to calendar.

3. Selecting Default Calendar to Add Tasks 

You can select default calendar to add tasks.