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
Your tax return just uses your age on Dec 31 for each tax year. But actually your age doesn't figure into taxes at all except for a few things. Like if you are 70 1/2 you have to start taking RMD distributions from your IRA or 401k. And if you are over 65 you get a higher Standard Deduction.
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