Here are 2 ways you can enter the State of IL PIN in TurboTax Desktop:
1) Go to State tab > File tab > Go to step 3 or Go through until you see the screen that that asks for the AGI > select the bottom option that says "verify your signature in a different way" > here is where you will enter the IL PIN number(s).
2) In the top right of the screen, click to switch to 'Forms' mode. Scroll down to the State of IL tax section. Scroll down until you see where to enter the IL PIN. Type it in.
