Retirement account withdrawals and earnings from a job may not be the only taxable income you have, either. The federal government taxes seniors' Social Security benefits if their income exceeds certain thresholds. If you live in one of the following nine states, you could owe some state Social Security benefit taxes as well.

Donald Trump wants to end federal income taxes on Social Security benefits but that would come at a steep cost.

Social Security benefits are a crucial income source for many retirees in the US. While most states don't tax these benefits, a few do. Here's what you need to know about where your benefits might be taxed and how federal rules apply.

If you're currently receiving or soon will be receiving Social Security retirement benefits, here's what to know about which states may tax you.