If you only made $3,300 and didn't have any taxes withheld, then you most likely will not be required to file.
However, if any of the $3,300 you earned was reported to you on a Form 1099-MISC, then you will need to file as this is considered Self Employment Income. You can check out this TurboTax FAQ for more information on filing requirements: Do I need to File this Year?
Finally, if you have children, you may want to file even if you aren't required to because you may qualify for the Earned Income Tax Credit. Check out this TurboTax FAQ for more information on this credit: What
is the EIC?
