Minn. Stat. § 290.093: TAX COMPUTATION FOR MUTUAL SAVINGS BANKS CONDUCTING LIFE INSURANCE BUSINESS.

Mutual savings banks as defined in section 594 of the Internal Revenue Code are subject to a tax computed on the taxable income determined without regard to any items of gross income or deductions properly allocable to the business of the life insurance department, at the rates and in the manner for a corporation not engaged in the business of issuing life insurance contracts.

This section applies only if the life insurance department would, if it were treated as a separate corporation, qualify as a life insurance company under section 816 of the Internal Revenue Code.