S.D. Codified Laws § 54-14-30
Any licensee under this chapter, in addition to the license and other fees provided by this chapter, shall pay the annual tax provided in chapter 10-43, upon the net income of the licensee measured by the net income assignable to the licensee's business in South Dakota. The State of South Dakota, any political subdivision of the state, and any quasi-governmental organization created by an executive order of the State of South Dakota and any subsidiary of such organization; any nonprofit United States Treasury Community Development Financial Institution, Small Business Administration Certified Development Company, or Regional Revolving Loan Fund; or any commercial club, chamber of commerce, or industrial development corporation formed pursuant to § 9-12-11 or 9-27-37 is exempt from the payment of this tax.
SDCL 54-14-30