Modifies provisions relating to estimates and allocation of certain nonresident income tax revenues

This bill requires businesses in Missouri that pay nonresident entertainers or professional athletes more than $300 to withhold 2% of that payment as a state income tax prepayment. The law defines these nonresidents as performers or athletes from outside the state and includes various forms of compensation such as salaries, bonuses, and guaranteed payments, while excluding competition prizes. Entities acting as payers must treat themselves as employers for tax purposes and remit the withheld funds to the state revenue director by the last day of the month following each quarter. Additionally, the bill directs the state to estimate annual tax revenue from these nonresidents and allocate portions of those funds to specific trust funds supporting the arts, humanities, public libraries, and public television.