Exempt Dividend interest on Illinois state return

[Deb_T2020]

I received dividends from an investment account and I have some exempt interest in my 1099-DIV(box 11). I know the amount of in-state and out of state income included in Box 11 of my 1099-DIV.  I am trying to answer this question presented by Turbo Tax while filling up my IL - State return

After clicking continue in this screen, I am taken to this screen

all I know is my exempt interest is from a national municipal bond mutual fund. What should I select in the screen above and what portion of my exempt interest is taxable in IL?

[DaveF1006]

According to the definition of a municipal bond, Municipal bonds are issued by state and local governments -- also called municipalities -- to raise money for public works projects like the construction and maintenance of bridges, hospitals, schools and water treatment facilities. Without knowing what the bond is for, pick a couple of entries above to move past the question. 

[Deb_T2020]

Thank you, for your response. I will give that a try