It depends on your filing status, age and where your income came from. If your income came from self-employment you will need to file a tax return. Also, if you had unearned income over $1,150 you will need to file a tax return. Please review the TurboTax Help article Do I need to file a federal return this year?
If you are not required to file a tax return but had taxes withheld from W-2 income, you may want to file a tax return to get a refund of the taxes withheld.
Please refer to the TurboTax article Do You Have to File an Income Tax Return? for additional information.