Capital Gains if Estimated Taxes Paid

[NoraC]

I sold some stock this year and paid (a little more than) the estimated taxes for both Federal and the State of California, based on the tax rates shown on the internet. I did my complete tax return on TurboTax, except for the Capital Gains, and expected a substantial return, since I prepaid the Capital Gains. When I got the final Capital Gain 1099-B, I entered that in, as well as my estimated tax paid, and my return went down by several thousand dollars. It is my understanding that Capital Gains should not affect my tax rate. Why did my taxes go way up?

[Bsch4477]

We would have to know your taxable income but see if your capital gains pushed your taxable income into the 15% tax bracket for capital gains. Also, if you have social security income more of that would be taxed. 

[NoraC]

Yes, we have Social Security income. I understood that Capital Gains don't change your tax bracket.

[Mike9241]

it can. in the turbotax file there is a qualified dividend and capital gain worksheet where the tax is calculated.