I accidentally selected Self-Employed I do not have any self employment income I was fixing my rejected return so I can't clear and start over. How can I revert to free?

To downgrade, you will need to clear and start over.  For more information on this, please see this Help Article.  

If this doesn't resolve your issue, please post here for further assistance.  

I was in the same predicament, however I found a loop hole!

Simply go to tools --> Delete a Tax Document --> and start deleting all your tax documents. 

Voila! Your numbers for both your Fed and State will eventually roll back to 0, and you can begin entering your information like you initally did!