What does "IL due" mean on the top bar?

I am doing my tax return with TurboTax and the amount of money that I will received from federal shows up on the top bar. But, the amount of money that I will receive from state does not show up although I finished state return process. It just shows up like "IL due $1". Is there anyone who knows what this means? I would appreciate it if you could explain this for me. Thank you in advance.