Estate or trust.

Annual returns of income of an estate or a trust shall be made to the department by the fiduciary thereof at or before the time such income is required to be reported to the internal revenue service under the internal revenue code. Under such rules as the department prescribes, a return made by one of 2 or more joint fiduciaries shall be sufficient compliance with the requirements of this section. A return made pursuant to this subsection shall contain a statement that the fiduciary has sufficient knowledge of the affairs of the person for whom the return is made to enable him or her to make the return, and that the return is, to the best of his or her knowledge and belief, true and correct.