Computation of Kiddie Tax In 2019, Simon, age 12, has interest income of $900 and dividend income of $4,000. He has no investment expenses. Determine Simon's net unearned income and total tax liability. Click here to access the 2019 tax rate schedule and 2019 Estate and Trust Tax Rate Schedule. If required, round the tax liability the nearest dollar. Net unearned income is $ 2,700 v. Simon's total tax is 284 x