How can I deduct out a state tax refund for 2014 that was incorrectly reported in my 2015 return but I did not actually receive it until 2016?

I received a state tax refund for tax year 2014 in January 2016.  Therefore I need to report it in my 2016 return.  I accidentally already reported it in my 2015 return though.  To avoid being taxed twice on it, where and how in Turbo Tax can I take it back out?