Received 1099-R due to deceased parent, is it taxable for state taxes

reading all these posts, I see that the 1099-R received after a parent's death or as an inheritance is federally taxable...but when I go to do the state taxes, that same amount automatically appears as retirement income on my state taxes and I'm taxed taxed on it there too.  Is that supposed to happen?  I thought that it was not taxable at the state level since it's paid at the federal level.  I live in Illinois.