Per the instructions, I file Missouri as a "part year resident. filing as a resident." In effect, I get taxed by Missouri on all my income and get a credit for taxes paid to the other state (Nebraska). I entered the dates of my Missouri residency on the info worksheet. (as well as the federal info worksheet). There is no error message, the form MO-2210 calculates a penalty spreading my calculated estimated taxes over the four quarters beginning in April 2023. I did make one estimated payment in January 2024 which was more than my final tax amount so I am getting a refund, but still assessed a penalty.
