I took a Traditional IRA deduction for 2016, but deposited funds into my Roth (2/17). I realized the error in 3/17 and recharacterized the Roth to a Traditional, but the return was already filed. I received a 1099-R for 2017 for this transaction. TurboTax is saying I may need to amend my 2016 return. The amount recharacterized is slightly less than the amount claimed on the 2016 return. I think I should amend 2016 using the lesser recharacterized amount, but I'm not 100% certain this is correct. Any assistance would be appreciated.