Thanks to all for the replies. I will reluctantly do the workaround rather than getting an appropriate fix from TurboTax. While I fully understand that it's impossible for TurboTax to code for all tax possibilities, I did a little more digging into this problem and found references back to at least 2020 where users have reported this problem on this forum. If every year people are reporting this problem, and perhaps only those astute enough to notice this incorrectly calculated tax issue, then TurboTax development should take notice and prioritize correcting this problem. I find it hard to believe that this is a rare tax occurrence. I suspect there are a number of people each year that actually do a split rollover of something like a tax deferred 401K into both a Roth IRA and a traditional IRA. Given that this problem is reported over and over again each year as a community topic, that should be enough to highlight that it's a very common issue. Worse yet, this problem can easily cause an incorrect tax to be calculated and reported for a TurboTax user not paying close attention to what is occurring under the covers in TurboTax. Given that, I respectfully encourage the TurboTax development team to escalate addressing this known problem.
