TurboTax calculates the tax on Long Term Capital Gains correctly.
"The LTCG are being added to your income and become "TOTAL INCOME"
That's exactly what it is supposed to do. LTCG is part of your total taxable income, just taxed at a different rate. The tax on your total income is calculated on the Schedule D Tax Worksheet or the Qualified Dividend and Capital Gain Tax Worksheet, taking into account the portion of your total income that is LTCG.
