Do you have to file a federal income tax return if you only made less than 3000?

Usually no. If you're Single under 65 and your gross income is under $8,950 for 2008 (under $9,350 for 2009), then you aren't required to file. However, even if you're not required to file, you should file if income tax was withheld from your paychecks in order to receive a refund of that tax. You also should file if you're eligible for certain tax credits such as earned income.