I am sorry that you were charged for the Tn. state return.  I am including the contact information for TurboTax customer service.  They will able to refund the charges for Tn. return.

https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number

To contact TurboTax customer service/support use their contact website during business hours.  

Submit your question/problem during business hours and then use the option for Call (a phone number will be provided for Call) to speak directly with a TurboTax agent -

https://support.turbotax.intuit.com/contact/ 

Note:  The Call option will not be available when TurboTax Support is closed.

Or if you want to go through the hassle of a phone tree to get the same results as using the contact website then use this phone number and select TurboTax - [removed]

Support can be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax