If you earned less than the minimum amounts, then you do not need to file with the IRS: "Your income, filing status, and age generally determine whether you must file an income tax return. Generally, you must file a return for 2012 if your gross income from worldwide sources is at least the amount shown for your filing status in the following table.
Filing Status* Amount Single $9,750 ~ 65 or older $11,200
Head of household $12,500 ~ 65 or older $13,950
Qualifying widow(er) $15,700 ~ 65 or older $16,850
Married filing jointly $19,500
Not living with spouse at end of year $3,800
One spouse 65 or older $20,650
Both spouses 65 or older $21,800
Married filing separately $3,800
http://www.irs.gov/...ations/p54/ch01.html