Do you have to file a tax return?  The filing requirements are based on your gross income.  For 2010, a single person under age 65 is required to file a return if their gross income is more than $9,350.  A married couple where both spouses are under age 65 are required to file a tax return if their gross income is more than $18,700. 

 The requirements are different for people who are claimed as dependents on someone else’s tax return.  Single dependents must file a return if their gross income is more than $5,700, or if their unearned income (such as interest and dividends) is more than $950.

 If you are self-employed, you have to file a tax return if your net income is more than $400, even if your gross income is less than the filing threshold amounts.

Even if you aren’t required to file a tax return, it might still be a good idea to file so you can claim a refund of any tax that was withheld.