Modifies provisions relating to the calculation of income tax, repealing income tax subtractions for certain capital gains

HB 2111 modifies Missouri's income tax calculation by adding certain items back to federal adjusted gross income that were previously subtracted, effectively repealing specific capital gains subtractions. It directly affects Missouri taxpayers who claimed federal deductions or refunds that previously reduced their state taxable income, such as pandemic-related federal tax refunds or certain capital gains. Key provisions include adding back federal tax refunds benefiting Missouri (excluding pandemic credits), interest on specific government bonds, and excess deductions for property purchases (2002-2003) or net operating losses. The bill eliminates prior subtractions for certain capital gains, increasing taxable income for affected taxpayers under Missouri law.