I am trying to understand this.  If I have it right in my mind, a trade or business that  does NOT qualify is some what like myself, tax prepare or financial advisor or some one with advice etc..   But a qualified trade or business would be like a store, a logger, a carpenter, a plumber etc...  I've read so many articles.. that it just confuses me.  Please HELP make this grey area black and white for me.

I thank you in advance for any help you can share to make this understandable.