I can answer that, its because turbo tax is a crappy scam tax place that steals your money, then says oh you have to do all the work, we won't tell you until after you paid us to do what you are going to have to do anyway using your paper your ink and your stamps, then when you try to print, they try to charge you more money. RUN and never look back at these scammers and their ignorant phone jerks again.
Let me know if you have further questions.
I sent my return in
Refund
Arkansas state income tax
P.o. box 1000
Little Rock, AR 72203-1000
It was returned
NOT DELIVERABLE AS ADDRESSED
UNABLE TO FORWARD
What's the deal?
I found this information about where it can be sent. There are two addresses for Individual Taxes, you may want to call to make sure which one to send to.