Why is my Missouri taxable income more than I earned in Missouri? MFJ living in KS. I work in MO, my spouse works in KS. Appears we are being taxed on both incomes in MO.

[MaryK4]

TurboTax allocates the income on W2 based on the W2 state entries, so if your wife did not have MO in Box 15-16-17 the income is not allocated to Missouri.  

However, Missouri calculate the tax as if you were full-time residents, then uses the ratio of Missouri income to compute the tax.  You may see the total income on the return, but you are only taxed on Missouri income.