100% of my income is LTC gains and qualified dividends and due to my large volume of deductions, and my Head of Household filing status, my tax rate is 0%. There is no way to inform the form 8615 calculations for that scenario. For some reason (which should be fixable) the form forces me into a "single" tax rate status - perhaps because that is my daughter's status. I had to change it manually in the worksheet. It exploded the amount of tax owed by my daughter to an amount more than she earned. I saw someone else describe this problem in March 2024. The form didn't prompt me to add my LTCG so had to do that manually. It completely confuses the calculations. My guess is that the parent having a lower tax rate than the child is so unusual the form can't manage it. This was all caused by taking an unqualified 529 distribution that should have gone to me instead of my daughter had I had the time to do the what if analysis. When I do it now, had I had the distribution to me, I would have saved $800 for my daughter because all I would have had to pay is the 10% penalty, no incremental income tax. So I KNOW that my tax rate would have still been 0% had I done this correctly and had the distribution sent to my account. I can't fix the 529 distribution error (unless you know differently) so I suppose all I can do is manually enter a "0" on line 9, which is what it is supposed to be according to the official IRS instructions for this form. If you can confirm this, then problem solved (at least for me) and I will never need to do this again. TT should still fix it for others as there are MANY complaints. Its NOT user error. Thanks
