I think I'll need to ask my payroll department about it. I only worked in Illinois, so no idea why they would withhold for two states for me.
My W2 form I have 'Copy B' to file with my Federal taxes, but I have three 'Copy 2's (one is my reference copy to keep, the other two have different amounts across multiple boxes). When I add up Boxes 16 and Boxes 17 from the two 'Copy 2' forms, they amount to what is showing on my Copy B.
I'm wondering if this is because part of my income was a bonus and maybe they treat that differently.
