Hi & thanks for using our service. I'll do my best to give you a complete & accurate answer. Please ask me to clarify anything you don't understand.
Are you talking about gross income?
How old are you? Are you single?
If you are single, under age 65, and your gross income is less than $9,500., you were not required to file a tax return for 2011.
Please remember to ACCEPT, otherwise I do not receive credit for answering your question.
That also presumes that you don't have any self-employment income in excess of $400.
Do you have any follow-up questions?
Is California your resident state & if so, what is the other state you worked in & did you have state income tax withheld from that state?