After you file

Your years are mixed up.  We are just filing 2019 returns now.  We don't do 2020 until 2020 is over next December.  

 

You must mean you needed to amend your 2018 return you filed in 2019.  I can't tell what you actually did and what you need to do.  Sounds like you still might need to amend 2018?  If you accidentally filed a 2019 now and it gets accepted and it wasn't complete you will also need to amend 2019.