This whitepaper discusses the implications of the U.S. Supreme Court's decision in South Dakota v. Wayfair on sales tax regulations and the necessity for simplification in state tax systems. It outlines how the ruling has shifted the landscape of sales tax, allowing states to impose tax requirements on remote sellers, which has become increasingly significant in funding government functions. The document highlights various states' attempts to simplify their sales tax structures, such as Alabama's Simplified Sellers Use Tax and New Mexico's adoption of destination-based rules. It also addresses ongoing challenges and complexities that remain, including litigation in Louisiana and Colorado regarding the burdens of tax compliance. The paper suggests that states can proactively simplify their sales tax systems without waiting for federal mandates, emphasizing the importance of uniform economic nexus standards and manageable notice requirements for tax changes. Overall, it advocates for a more coherent approach to sales tax that balances state revenue needs with the ease of compliance for sellers.