Roth recharachterization exceeded limits

My  husband and I contributed to our Roth IRAs in early 2017, BUT we exceeded income limits for that year. So, in March 2018, we recharacterized those contributions to non-deductible traditional IRAs. We filed Forms 8606 with our 2017 joint return along with info on the original contributions and recharacterization. Do we report any of this recharacterization info in our 2018 Turbotax return? I input one of the two 1099-R forms the custodian sent on these recharacterizations, and Turbotax is saying I may need to amend our 2016 return! Why?