I moved from Wisconsin to Missouri, I paid tax in Wisconsin until Sep, what should I fill in double taxed wages? If I don't fill any thing I am not getting credit in MO.

If I don't fill any thing I am not getting credit in MO and I've been asked to pay $8K as state tax. My question is, If I have already paid around 8K taxes in WI, what should I fill my wages from WI in "were you double taxed" field? Am I actually double taxed?