All states have not adopted new regulations brought about by the "Wayfair" ruling of the US Supreme Court. The decision permits each state to review and expand the definition of substantial nexus within their state. The old rules required physical presence in a state to establish nexus. The Wayfair decision replaced physical presence with "economic" presence. I am sure MO will eventually get on the bandwagon.
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"A man who carries a cat by the tail learns something he can learn in no other way."
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