I have a corner-case situation for which I can't find an answer on what the rule is and of course how to handle in Turbo Tax a situation where I made separate conversions from a Trad-IRA to a Roth once with taxed money and another with pre-tax money but never co-mingled.
Details:
Early January 2020 I did a $6000 backdoor Roth contribution by first making a non-deductible contribution to a Traditional IRA (that had a zero balance) and then converting that entire 6K to a Roth a few days later (putting the Trad-IRA back to a zero balance). That would be a simple back-door contribution situation with no taxes. However in August, I rolled a conventional 401K into the same Traditional IRA and subsequently converted $50K (which is only a portion of the new balance) to the Roth. My 1099-R shows a distribution of 56K (all of which is marked as taxable in box 2a in the form).
Based on the lack of co-mingling of any of the pre/post tax funds at any time, I would assume that the 50K is 100% taxable while the 6K should sail through with no taxes. Am I right? If I'm correct, how do I handle it in Turbo Tax to have the 50K taxed and the 6K not be taxed instead of having it apply the pro-rate formula?
