If you had Wisconsin tax withheld instead of Iowa (look at boxes 15-17 on the W2), that may explain the change. In general, the withholding is like a deposit and after the tax is computed, any excess withholding (if any) is refunded. Your withholding is done to the state where you work.
Did you work in Iowa for the same company in all of 2020?
I figured out it’s actually some glitch in the turbo tax system. I re-entered all of my same information and no longer owed into Iowa...unfortunately turbo tax is somehow changing my information on my w2s after they are entered...
I would recommend logging out of TurboTax, clearing your browser cache and cookies, then logging back in and running your review again. Cookies are small files that temporarily store data on your computer. We use them to personalize your experience so you see information you already entered and not items that are irrelevant or repetitive. On rare occasions, they may make your browser think you already did something that you still need to do. To fix that, you'll need to delete (clear) the cookies from your browser. Each browser has a slightly different method for deleting cookies. Choose the browser you're using:
The pandemic has affected your taxes in many ways. Including reporting in TurboTax the amount of stimulus money you received. Click Here for more information on how the Pandemic affected your 2020 taxes.