Your question is vague. What kind of retirement income are you asking about? If your ONLY income is Social Security you do not have to file a tax return. But if you receive any other sort of income then your Social Security may be taxable. And, other sorts of retirement income like pensions, distributions from retirement accounts like IRAs or 401k's are taxable on your federal return--and maybe on your state return depending on your state's tax laws.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
