No, global/global_player.pl
This is a player script that is responsible for handling player events. So as a task is completed, that sub EVENT is triggered. In which $task_id passed through it as the current task that the client has completed. You just need to check for that task id and complete the task.
You could do something like this just to test ingame:
Code:
sub EVENT_TASK_COMPLETE{
if($task_id == youridgoeshere){ $client->Message(15, "Hi this works"); }
}