Minn. Stat. § 290.03: INCOME TAX; IMPOSITION, CLASSES OF TAXPAYERS.

An annual tax for each taxable year, computed in the manner and at the rates hereinafter provided, is hereby imposed upon the taxable income for such year of the following classes of taxpayers:

(1) Resident and nonresident individuals;

(2) Estates of decedents, dying domiciled within or without this state;

(3) Trusts (except those taxable as corporations) however created by residents or nonresidents or by domestic or foreign corporations.