1040 line 12c should be lines 12a + 12b. Instead, 12c displays 1040 line 10 value (or 8 as 10 & 8 can be the same value). Lines 14 & 15 still appear to compute/display correctly. An override on 12c to display the correct 12a+12b does not appear to disturb the compute/display of lines 14 & 15. Suggests computation code for lines 11 through 15 is correct but the code which populates 12c for display is pulling from the wrong place in the tax model data structure.
