@faajaa40
Since both of your jobs remained in MO, both before and after the move, I suspect that your error on the 2018 NRI tax return, was that you apportioned less than 100% of just your "job wages" to MO. Certainly, all of your other income types (Interest, dividends, investment income from stocks or mutual funds...other non-W-2 stuff), those would be apportioned as some $$ amount less than 100% according to exactly when you moved, but since your job wages were all done by you both physically working in MO, even after the move, then all of your "wage" income should have been allocated as MO-nonresident income.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
