Especially if you used a picture, or imported it, sometimes those mess up.
Go back and edit that W-2.
Down in box 15, ther are two parts to it...
1) A state two letter code.
2) A number
Delete the number entirely, making it blank....click in another box...then click back in the ID number block and type it in carefully. That "should " work.
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Other:
If you crossed into UT to work during the year, and have a UT state line on that W-2, the final three letters on the UT code number must be a lower case "wth"..
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*