I have a "Create Record" button on a Lightning list view. It creates the record in the custom object when the user hits Save and then puts the user on a view of the newly created record. Instead of this, I would like the user returned to the List View where the button was called. We have Salesforce Professional.
As per comment, You need the Return URL parameter in button URL. A sample example is below:-
If you are working with Lightning URL Hack, below formula will work. It has backgroundContext that works same as Return URL parameter.