org-treat-insert-todo-heading-as-state-change

org-treat-insert-todo-heading-as-state-change is a variable defined in `org.el'.
Its value is

nil

Documentation:
Non-nil means inserting a TODO heading is treated as state change.
So when the command M-x org-insert-todo-heading is used, state change
logging will apply if appropriate. When nil, the new TODO item will
be inserted directly, and no logging will take place.

You can customize this variable.