Retirement tax questions

The code in 1099-R 2019 for Roth distribution is PJ.

I am in error regarding my 2018 1040.  That is for 2017 taxes for which I had NO excess contribution.  In 2019, I withdrew 2018 excess contribution in February 2019 for the 2018 excess.  I received a 1099-R in January 2020 for the February 2019 distribution. So - the recent 2019 taxes filed July 2020 is the only instance of paying the "Other Tax"

Somehow in the Q and A while filling out my taxes this year I must have incorrectly answered No Distributions taken from Roth in 2019.  It's not a large amount of penalty that I paid, $254, but I would like to amend the tax form if possible.