TCJA 2017 ADS method on remaining basis over remaining life

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Hello, Does anyone know the steps necessary and the depreciation key to use to convert the exisiting real property and qualified improvement property to ADS method on remaining basis over remaining life?  I found the attached articles on SAGE release 2019.1 statingthere will be two new methods that is addressing the need for special handling on
ADS method to calculate on remaining basis over remaining life for mid month or HY/MQ but it does not state which two methods/ keys are actually added.  Thanks!
   pp-communityhub.sage.com/.../SAGE-Tax-Cuts-and-Jobs-Act-of-2017_2D00_ADS-Method.pdf