The tax on Social Security income is not calculated separately on your tax return. Part of your Social Security income is included in your taxable income, and the tax is calculated on your total taxable income, including a portion of your Social Security income.
The Total Tax in the TurboTax summary is the total tax from Form 1040 or 1040-SR line 24. It includes the tax on part of your Social Security income. On Form 1040 or 1040-SR your total Social Security income is on line 6a and the amount that is taxable is on line 6b.
