Declaring immigrant status on 1040 (2020)

Hello,

 

My question is related to this news report (0:43 specifically) about changes by the IRS to 1040 for green card holders. As per the report, green card holders are somehow required to declare they are foreign nationals. I found this previous conversation where someone mentioned it goes into effect starting tax year 2020 and indicated entering foreign country with a U.S. address is not correct. 

 

What is the right way to do this? Also, how can I achieve this on turbotax? Any information would be greatly appreciated. Thanks!