Voters should care about this bill because it impacts who pays taxes and how much. For businesses that operate nationwide, this bill could simplify their tax obligations and potentially reduce their costs, which might lead to lower prices for consumers or more investment by companies. It addresses the ongoing challenge for businesses trying to understand complex and varying state tax laws. However, for states, this bill could mean a loss of tax revenue that they use to fund public services like schools, roads, or healthcare. It also touches on the balance of power between federal and state governments regarding the ability of states to tax businesses within their borders.