# Sales & Use Tax > US state sales and use tax compliance: state department of revenue taxability and registration rules, the Streamlined Sales Tax Agreement (SSTA) governing member-state uniformity, and economic-nexus thresholds established after South Dakota v. Wayfair — grounded exclusively in state department of revenue publications and streamlinedsalestax.org. License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Source: MIND (m-i-n-d.ai) Hub: https://www.m-i-n-d.ai/minds/sales-tax