This article will explain the following pertaining to tasks:
Go to Company > General Settings > Task Types
Click "Create New"
Enter the name of the Task Type and click "Create"
Trip specific tasks can be initiated automatically on creation of the trip or at any stage through the process. In addition, conditions can be set for any trip task item so it only creates when a specific situation occurs. The conditions that can be set are aircraft/aircraft type, airport/country and accounts/account type/contacts.
Go to Company > General Settings > Task Templates
Click "Create"
Enter in the name for the Task List, select if the task list will be based off a trip, quote, or general and finally add in a description
Finally, click 'Create'
Click on the name of the task list to add tasks to the list and then click 'Create'
There are various fields within a task item that can be used to define conditions and specifications on each task item. Here is an explanation of all fields within a task item:

Here is an example of a General Task List for a new hire
Here is an example of a Trip Based Task List:
Example of specific trip based task item settings:
When entering the "Due In" value, if the task needs to be completed "before" enter a minus before the value. For example, if due 2 days before Initial Departure Date, enter -2 in the "Due In" field. Then the due date will calculate accordingly. Ref: T-C01