Amending 2019 Return (software issue) with 1040-x

I learned that we had a separate W-2 for the one month in 2019 that my wife had maternity leave. So I now need to amend my 2019 Return.

 

Couple issues:

  1. I followed the instructions, downloaded the 2019 version and started adding the new W-2, but the filing page has not generated a 1040-X form. It's just generating new 2019 returns as if this were my original return, but does not indicate that anything was amended. What am I doing wrong? Do I need to manually fill out a 1040-X? 
  2. What is the new amount I owe? I originally was given a $1000 refund (let's say), and now it's saying $400. Should I then expect to pay $600 to the IRS as a result of this amendment?

 

Thanks