TurboTax only asks the question to determine how much of the distribution might have been eligible for rollover. If you didn't roll over any part of these distributions, it doesn't matter how you answer this question.
If you did roll over any of these distributions, the first amount distributed from these IRAs is RMD up to the amount of the RMD for that particular account; the rest can be rolled over. However, if you do not roll over any of that first distribution, the amount in excess of the RMD for that account can be applied as RMD for another of your IRAs. In your example, if you treat the first distribution of $12,000 as RMD for both of your traditional IRAs, you can roll over any other single distribution made from any of your traditional IRAs for that year. (Rollovers are limited to one distribution rolled over per 12 months across all of your IRAs.)
