Do I need to file an amended return for 2015 because I recharacterized a portion of the amount I converted to my Roth IRA from my Rollover IRA?

I recharacterized a portion of my Roth IRA conversion from my Rollover IRA for 2015 tax year. The recharacterization was done in 2016.  My 2015 tax return reflected the recharacterization.  Turbo Tax is now telling me that I need to file an amended return for 2015.