Social Security Taxes Estimate how much of your Social Security benefit may be considered taxable. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Related Content Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. Get Paid for Going Green Those looking into environmentally minded home modifications may get a boost from Uncle Sam’s tax incentives. Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction.