If you are single and you made less than $8000, you should be ok and you shouldn't owe anything.
Your standard deduction is $4850 and your exemption for claiming yourself is $3100.....
So...anything you made over $7950, you would owe taxes on. If you made less than $7950, you don't owe anything...but, you could still receive money back from Earned Income Credit or other credits that may pertain to you.
If you would like to have money taken out in the future for Federal Income Tax....you could change your W-4 with your employer and claim Single / Zero / +$$$ whatever amount you want taken out.
speed