Get your taxes done using TurboTax

I am having a problem with a capital gain calculation.  It appears that the long term capital gain on schedule D Form 8949 is calculating the tax amount at 21% instead of 15%.    I upgraded to Premier at the advice of the "advisor" and it didn't solve the problem.    My income is nowhere near the 553,850 maximum for 15% LTG, so why is TurboTax calculating 21%?