What constitutes “Nexus”, O.A.C. § 710:50-17-3
Summary
(a) If a corporation has one or more of the following activities in Oklahoma, it is considered to have “nexus” and shall be subject to Oklahoma income taxes:
(4) Ownership of a stock of goods in the hands of a distributor or other non-employee representative in Oklahoma, if used to fill orders for the owner’s account.
(5) Usual or frequent activity in Oklahoma by employee or representative soliciting orders with authority to accept them.
(6) Usual or frequent activity in Oklahoma by employee or representative engaged in a purchasing activity or in the performance of services (including construction, installation, assembly, or repair of equipment).