The amount of taxable social security is dependent on your other taxable income and your marital status. Take one-half of your social security benefit of $56,796, or $28,398. Add that to your other taxable income. Subtract $32,000 from the total if you're married, filing joint, or $25,000 from the total if you're single. Divide the balance by 2. The lower of that amount or 85% of social security benefits is the taxable amount of your social security.
I cannot imagine either TurboTax or the IRS would make a calculation error on the taxable amount of social security. No one pays tax on the full amount of their social security benefits. The maximum taxable amount of your social security is $48,277 (56,796 x 85%).
For more details, see this IRS webpage:
https://www.irs.gov/newsroom/dont-forget-social-security-benefits-may-be-taxable
