Hi Jenny,
I am curious to see how tagging can work.
So I tried building it out in the following sample Ragic database.
You can play around and see if it’s close to what you are after.
In order to get the “Multiple Select” field to be populated by field in the subtable took some work around in the Javascript Workflow.
If you like to see how the Javascript works, you can provide me with a email so I can add you as a SysAdmin in this sample database.