Just joining in to this conversation after finding it relevant to the issue I'm looking for a solution. @PreciousB your reply has been posted in April 2019, I'm wondering if Intuit has yet come up with a solution for this question at hand. 

I have a client as well who runs one business but his services advertised under different DBA names. He supposed to generate invoices under the name that customer made the call and recognizes. Creating a new style in QBO is not working at all because changes immediately applied to all styles.   

Thank you!