Can I enter 0 for box 16 and 17 if blank on my W2?

I live in IL and work in WI, which has reciprocity. I have IL taxes withheld, but there is still an entry on my W2 for WI. Because I have no WI tax, boxes 16 and 17 are blank, but TurboTax is flagging my W2 as incomplete because of this. Can I enter 0 for these spaces even if the boxes are blank on my W2?