On April 1, 2019, California and Nebraska will be enacting and immediately imposing economic nexus standards. At a high-level, here is an explanation of each state's economic nexus thresholds.
California - Companies with gross sales of at least $100,000 or greater OR 200 individual transactions in California during the previous or current calendar year have established economic nexus. These companies must register to collect and remit sales tax.
Nebraska - Companies with gross sales of at least $100,000 or greater OR 200 individual transactions in California during the previous or current calendar year have established economic nexus. These companies must register to collect and remit sales tax.