Authorizes counties to adopt a real property homestead tax exemption for certain disabled veterans

HB 3543 allows Missouri counties to create a property tax exemption for disabled veterans' primary homes starting in 2027. It defines "disabled veteran" as a Missouri resident with a service-connected disability (100% disabled or compensating for unemployability) who owns and occupies their home. The exemption covers up to $32,500 or the federal maximum amount of property tax, and it extends to surviving spouses or minor children who continue living in the home. Counties must seek voter approval for a replacement sales tax to offset lost revenue before implementing the exemption.