Excess roth ira contribution and earnings withdrawal before tax due date. The excess for 2018 but happened March 2109. How and where do I report this on my 2018 taxes?

I contributed $6500 to Roth IRA in May of 2018.  In March 2019 I had to withdraw $3300 as an excess contribution for 2018 along with $61 for the interest earned on the $3300. How do I report the interest and the 10% penalty for early withdrawl as the Roth IRA was only 2 years old.