You must file a return if you are required to based on the amount of income you had. If you had more than $6300 of W-2 income, you must file a return. If you had less than that but had federal income tax withheld, you should file a return to get a refund.
If you had more than $400 of 1099-MISC income, you must file a return to pay self employment tax.
If you had scholarship income reported on your 1098-T in box 5 that exceeded the amount in box 1 or box 2, you must enter it on your tax return by entering the 1098-T.
If you file a tax return, you must indicate on it that you can be claimed as a dependent by someone else.
