do you really intend to file 2019 late and 2018 which is already late?
There is a penalty for that.
You really want to e-File 2019 so you can then also e-File 2020.
You need to do your 2018 return if there is potential impact of 2018 on 2019.
IRS has staffing issues for paper processing that don't seem to be going away soon.
