If I'm married and my 2009 income is only 2000 do I need to file a tax return in 2010?

You probably aren't required to file a return. Generally, if you're Married Filing Jointly under age 65, you're not required to file a return if your gross income for 2009 is under $18,700. Although you're not required to file, you should file if you're eligible for certain credits, such as earned income or making work pay.