RE: Any way to tell which Bill a Journal Entry came from (SS2.0 and UI)?
I’ll need to do this in SS but am also curious in general how to tell which Bill generated a JE. Any thoughts?
Bills do not normally generate JEs so that is an interesting question. Why is a JE being generated in your case?

I have seen some companies using JE for all kind of transactions i.e. vendor payment, customer payment, book revenue etc. It could be one of these