Modifies provisions relating to an income tax deduction for certain National Guard duties

HB 2620 creates a Missouri income tax deduction for National Guard and reserve military members' training pay. It phases in a percentage deduction starting at 20% for 2020, increasing by 20% annually until reaching 100% by 2024. The deduction applies to income from inactive duty training (IDT), annual training (AT), and certain enlistment bonuses (starting 2025), but excludes civilian federal service pay. This directly affects Missouri taxpayers who serve part-time in National Guard or reserve units.