Answer is wrong. It looks like answer that is marked as best is incorrect. You should not include the distribution from a non spouse inherited ira. As indicated in this threads later answer
I'm having this same issue and have not submitted my taxe return yet. I'm using federal free turbotax edition. It only asks if you have received any distributions. It does not tell you what types not to include. You have to read irs 8880.
I found this answer here https://ttlc.intuit.com/community/retirement/discussion/will-inherited-ira-rma-s-effect-retirement-s...
I'm going to file later this week I'm not going to claim the distribution i received when my sister and I inherited and split our deceased fathers ira.
I do hope I'm right please chime in if I'm incorrect
