Amended return problem

I paid an underpayment penalty of $27 on my 2019 return, filed in February. Later I went back to TT and adjusted the date of my first tax payment, which was taken from an RMD in January 2019. This removed the penalty of $27. I did this BEFORE I decided I wanted to file an amended return, bu AFTER filing my original return. Now I am trying to file the amended return, and TT thinks the correction I made was already part of the original return. In other words, TT says I am not owed the $27!  I cannot see how I can correct this.

 

What can I do so that I can file the amended return and recover the $27?

 

PS. I am unhappy that TT never asked me about the penalty before I filed the first time. In other years it had, but not this time!