Mich. Comp. Laws § 206.803: Definitions; B to E.

Sec. 803.

(1) "Business activity" means a transfer of legal or equitable title to or rental of property, whether real, personal, or mixed, tangible or intangible, or the performance of services, or a combination thereof, made or engaged in, or caused to be made or engaged in, whether in intrastate, interstate, or foreign commerce, with the object of gain, benefit, or advantage, whether direct or indirect, to the taxpayer or to others, but does not include the services rendered by an employee to his or her employer, services as a director of a corporation or S corporation, or services as a manager of a limited liability company that has elected to file as a C corporation or S corporation for federal income tax purposes.

(2) "Business income" means federal taxable income and includes payments and items of income and expense that are attributable to business activity of the flow-through entity and separately reported to its members.

(3) "Corporation" means a person that is required or has elected to file as a C corporation as defined under section 1361(a)(2) and section 7701(a)(3) of the internal revenue code.

(4) "Department" means the department of treasury.

(5) "Domicile" means the principal place from which the trade or business of the flow-through entity is directed or managed.

(6) "Employee" means an employee as defined in section 3401(c) of the internal revenue code. A person from whom an employer is required to withhold for federal income tax purposes is prima facie considered an employee.

(7) "Employer" means an employer as defined in section 3401(d) of the internal revenue code. A person required to withhold for federal income tax purposes is prima facie considered an employer.