TurboTax may ask two questions about your IRA distribution and RMD's. The first is whether the distribution you took is an RMD. For your wife's OWN IRA, the answer to this question is "no", because she was under age 72 and the distribution was not required.
If the distribution is required, as you say it was for the INHERITED IRA, then there is a second question as to whether the distributions equal/exceed the TOTAL AMOUNT that was required. Some individuals may take a Required Distribution that is less than the TOTAL AMOUNT REQUIRED. If the full RMD is not taken, Form 5329 would be added to the return to calculate the penalty owed for not taking the full amount of the RMD.
It might be easiest to delete each of the three 1099-R forms that you have already entered and then add them to the form again, making sure that you answer all of the questions about an account before moving on to the next one. You might also find it helpful to include your initials at the end of the account name so that you can easily tell which one belongs to each of you. I've been doing that for years without any filing problems.
Good luck.
