Every partnership including, but not limited to, a foreign partnership, the individual members of which are subject to taxation under this chapter, shall make a return for each taxable year. The return shall state specifically the items of the partnership's gross income and the deductions allowed by this chapter, shall include the names and addresses of the individuals who would be entitled to share in the net income of the partnership if the net income were distributed, and shall specify the amount of the distributive share of each individual. The return shall be sworn to by any one of the partners. The term "partnership" includes, but is not limited to, a syndicate, group, pool, joint venture, or other unincorporated organization through or by means of which any business, financial operation, or venture is carried on and which is not, within the meaning of this chapter, a trust, estate, or corporation. The term "partner" includes, but is not limited to, a member in such syndicate, group, pool, joint venture, or organization.