TurboTax did not correctly calculate my taxable Social Security amount. IRS reduced my refund by correctly calculating the amount.

[gk56]

If you receive more than $25,000 for a single or $32,000 for a couple, 85% of your social security is taxable.

[xmasbaby0]

No---up to 85% of your SS becomes taxable if you have other income, depending on how much other income you received.   

If you have other income and were not taxed at all on your Social Security, then you may have skipped past or answered incorrectly on the screen that comes right after you entered your SSA1099. The next screen asks if you lived in certain foreign countries while receiving SS.   If you did not answer correctly on that screen, no tax was taken from your SS and you will end up getting a letter from the IRS.