Even if you don't have to file, you should file a tax return if you can get money back. For example, you should file if one of the following applies.
You had income tax withheld from your pay.
You made estimated tax payments for the year or had any of your overpayment for last year applied to this year's estimated tax.
You qualify for the earned income credit.
You qualify for the additional child tax credit.
You qualify for the refundable American opportunity education credit.
You qualify for the health coverage tax credit.
You qualify for the credit for federal tax on fuels.