@dascpa If you haven't already, look into the Help Center for updates in the ReadMe file. 

1. Along the program toolbar, go to Help → Help Center.

2. Within Help Center, under Technical Support, expand the ReadMe Information.

-This will list all installed tax modules 
3. Select the desired tax module to view its release notes.

Thanks for your feedback. Viewing the release notes for a ProSeries update has been added to the article How to update ProSeries software.