My combined income of half of social security income other income equals less that 34,000. why is my social security being taxed at 85%

[VolvoGirl]

You might be doing the worksheet by hand wrong.  It can be tricky.

To see the Social Security Benefits Calculation Worksheet  in Turbo Tax Online version you would have to save your return with all the worksheets to your computer.   Or if you are using the Desktop CD/Download Software you can switch to Forms Mode (click Forms in the upper right) and click on SS in the list on the left side.

Is your Social Security taxable?

https://ttlc.intuit.com/community/income/help/is-my-social-security-income-taxable/00/25600

IRS Pub. 915 on Social Security.  There is a worksheet on page 7.

https://www.irs.gov/pub/irs-pdf/p915.pdf

[DoninGA]

The taxable amount of your SS benefits are not being taxed at 85%

Look at your tax return Form 1040 Line 6b for the taxable amount of your SS benefits.

Click on Tax Tools on the left side of the online program screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.

[SweetieJean]

 my combined income of half of social security income other income

It's 50% of Social Security plus 100% of other income.  And "my" suggest that you are Single.  If so, the reference is $25,000.  For Married Joint, it is $32,000, not $34,000.

[VolvoGirl]

It can be 34,000.  The taxable amount of Social Security is a range.

For Single between $25,000 and $34,000, you may have to pay income tax on up to 50 percent of your benefits.  For more than $34,000, up to 85 percent of your benefits may be taxable.

For Joint between $32,000 and $44,000, you may have to pay income tax on up to 50 percent of your benefits.  For more than $44,000, up to 85 percent of your benefits may be taxable.

See,

Benefits Planner | Income Taxes And Your Social Security Benefit | SSA