Was social security taxable in 2018

[eyemanruthk]

I entered our social security benefits in turbo tax in 2018. Just received a letter from IRS stating that we owe taxes on this amount.  Was our social security benefits subject to tax in 2018?  If so, why was it not included as taxable in my turbotax printout?

[DoninGA]

Did you have other taxable income in 2018 and did not report that income on your 2018 tax return?

The IRS notice you received should explain in detail why the believe you have 2018 taxes owed.

[VolvoGirl]

Yes it is still the same.  Up to 85% of SS can be taxable depending on your other income.

If they say more of your SS is taxable it's because they increased some other income.  A common thing they increase is the taxable income of any 1099R you had.  Either you missed entering one or your reported the wrong taxable amount.  Or it showed up on the wrong line so the IRS missed it.  

Check 2018 1040 line 5a and 5b for Social Security and line 4a and 4b for retirement.