For two reasons: (1) Because as a young person it is important to learn how to plan for your future and this is a tool to do so and (2) Because the TILP determines your financial benefits and ILP services (like housing, college financial aid, tutoring, and work clothing). For these reasons, your plan should be complete and detailed.
The TILP should list (1) your goals for the next six months, (2) the services you need to reach them, (3) people who are responsible for helping you reach these goals, and (4) a target date for completion of these goals. You will need the services described in your TILP to help make it on your own as an adult. Now is a good time to start thinking about your future and what you would like to be doing as an adult. Think of the TILP as the roadmap to help make the dreams for your future come true. Even if you are not sure about what you want to do as an adult, it never hurts to begin developing a good plan. You can update your TILP as many times as you want to reflect your changing interests, goals, and needs.