Youth Tax Fairness Act of 2019 This bill amends the Internal Revenue Code to treat certain income as earned income for purposes of the taxation of the unearned income of certain children (i.e., the kiddie tax). Such income includes (1) distributions from qualified disability trusts, (2) certain military survivor benefits, (3) certain first responder survivor benefits, (4) certain Indian tribal payments, (5) certain scholarships or fellowship grants, (6) Alaska permanent fund dividends, and (7) Social Security benefits. Treating such income as earned income allows it to be taxed at lower rates.