Retirement tax questions

Great. That works for the $5,500 I contributated for 2017. Thanks.
However, besides the one above, I also transferred $5,500 to Traditional IRA for 2016 from my bank account on 3/1/2017, and then immeidatedly converted to Roth IRA. Somehow I forgot to enter this into Turbotax when I filed 2016 tax return last year. Is there anything I can do to put that $5,500 for 2016 as non-taxable?