It's no longer a case of where it ships
from but instead where it ships
to...
https://en.wikipedia.org/wiki/South_Dakota_v._Wayfair,_Inc.
Based on that Supreme Court decision, a state can decide whether or not to collect tax on out-of-state e-commerce. Amazon collects tax on orders from all 50 states now, Newegg is close behind, and eBay is at 27 states:
Alabama, Arkansas, California, Connecticut, District of Columbia, Idaho, Indiana, Iowa, Kentucky, Minnesota, Nebraska, New Jersey, New Mexico, New York, North Dakota, Oklahoma, Pennsylvania, Rhode Island, South Carolina, South Dakota, Texas, Utah, Vermont, Virginia, West Virginia, Washington, and Wyoming
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VM