I'm Doug, and I'm sorry to hear of the confusion. My goal is to provide you with excellent service today.
So we are both on the same page, I believe you are referring to a social security benefit---either retirement, a spouse benefit or a survivor benefit---and not SSI (Supplemental Security Income), which is a form of welfare payment.
SSI is not taxable at all, while social security benefits are taxable. Even though your total income was less than $25,000 for the year, you still must declare your social security income as income on your tax return. It will not be taxed but must never-the-less be identified on your return.
In conclusion, yes you need to declare your social security benefits in your tax return---however they will not be taxed because your income was less than $25,000 last year.
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I wish you and yours the best in 2016,