After you file

Yes. TurboTax updated its 2019 software in April and the 2018 software in May. It's now supposedly accurate, with the option (which you can access either through Step-by-Step or by working on Form 8615) to select the parental tax rate. This sometimes but not always results in a lower tax for the youngster. If TTax has done this correctly (I'm not entirely convinced), then starting with 2020 some youngsters are going to be disadvantaged by being forced to use the old rules. But at the moment we have our choice and can actually use the Kiddie Tax rules for one youngster and the parental rates for a sibling.