@WY6 You didn't give us enough details about your own tax return to exactly reproduce your problem. But I think you are running into a known bug in the calculations on Form 8615. TurboTax is working on the problem. In the meantime, here is a way that you might be able to work around the bug and get a correct result.
Do you have any qualified dividends on your own tax return? If not, go through the Child's Income interview again in the child's tax return, and enter $1 in "Parent's Qualified Dividends." When you press Tab or click Continue you should see the tax amount change. Go back and delete the qualified dividends that you entered, or change it to zero. Then proceed through the rest of the Child's Income interview until you get back to the income summary screen. Does Form 8615 look correct now?
If you need further help, please tell us whether you are using TurboTax Online or the CD/Download TurboTax software, and what edition (Deluxe, Premier, etc.).
