Within the ticket view, you’ll see a cog, which is the settings icon. From there, you can choose Add Task.
Note: There is also a shortcut for this. When looking at the ticket, click on “t” and the pop-up to create a task will show.
Once you select this you will be given an option to select the project and the task list to add your task to. All the functionality you would expect to have within Teamwork Projects when creating your tasks is available to you.