Age is not relevant for you to receive a tax refund or not. If your total tax payments are greater than your total tax liabilities then you will receive a tax refund for the overpayment. If your total tax payments are less than your total tax liabilities then you will have taxes owed.
See Table 2.2015 Filing Requirements for Dependents in this IRS Publication 501 - https://www.irs.gov/publications/p501/ar02.html#en_US_2015_publink1000220698
