Additional information. I noticed that Missouri is phasing out the Federal Tax Deduction. As a result, the taxes have increased in Missouri. One possible explanation for the issue that I am observing on the Illinois Schedule CR could relate to this change in Missouri. For example, the lower amount that is populated on the Illinois Schedule CR seems to correlate to the amount of taxes that "would have been calculated" had this Federal Tax Deduction change had not occurred. It seems as if the Illinois Schedule CR form is not simply pulling information from a specific box on the Missouri form but rather doing some calculation of Missouri taxes based on the pre-2019 rules related to the Federal Tax Deduction on the Missouri Tax form.
