Kiddie Tax up to age 23

For 2020, investment income such as dividends, interest, and capital gains over $2,200 will be taxed at the parent's marginal tax rate again. Children's income was taxed at trust rates for 2018 and 2019, but the change in the law which happened on 12/20/2019 is retroactive to 2018. You may have to file an amended return to take advantage of this change if it is beneficial to your situation.