Roth IRA excess contribution removal.

.                                                                 In Jan 2018 I opened a roth ira for $6500 and later found agi was too high to contribute to roth ira. I did not remove the contribution in 2018. The roth is now worth $7100. I know there is a 6% penalty for each year the contribution remains in the roth. What is my best option as of today 4/12/19 I am planning to recharacterize to a trad ira. Is there a better action to take. How do I calculate the penalty in turbotax and will I pay it in 2019 taxes or in 2018 taxes, I plan to make the move today before the tax deadline April 15.