Thank you for pointing out that there are cases where the error does result in a change in taxes owed.
I can confirm that on my return, overriding the values or not overriding the values does not affect the tax owed. Specifically, on my return, TurboTax computes MO-A 8aY and 8aS incorrectly. 8aY and 8aS carry down to MO-A line 18Y and 18S which are incorrect. 18Y and 18S carry to MO-1040 line 4Y and 4S which are incorrect. 4Y and 4S carry to 5Y and 5S which are incorrect. MO-1040 line 6 sums 5Y and 5S where the errors cancel out. On my return, line 5S is negative with or without the error so the income percentages on line 7 are 100% and 0% with or without the error and the remainder of the tax calculations are the same with or without the error.
I did go back and check my 2021 and 2022 MO returns and there was no US government income for S so the problem that we are seeing would not be triggered.
I'm not sure if the error that you encountered is exactly the same as the one I encountered but in both cases, MO-A is being computed incorrectly by TurboTax. I too spent considerable time trying to figure out what TurboTax was doing and whether or not it resulted in an incorrect computation of taxes owed. I too was very frustrated that I could not report the problem.
