1) if you are a dependent you must indicate that you will be claimed as a dependent on your return
2) the 1098-T goes on the parents return for any education credit they may be eligible for and on your return if you have taxable scholarships
3) you can be on the parent's insurance until you are 26 even if you are not a dependent ... if they have ACA insurance they will get a 1095-A form for their tax return ... you (as a dependent) will not need to enter anything from the 1095-A on your personal return.
