If it was W-2 income and you claim yourself on your tax return, you are not required to file if the total income is below $10,300. If you had federal income tax withheld, you should file a return to get a refund. If you are claimed as a dependent on someone else's tax return, you must file a return because your income was more than $6300.
If the income was reported on a 1099-MISC or no form, you must file a return to pay self employment tax.