"Association." Any partnership, limited partnership, or other form of unincorporated enterprise owned by two or more persons.
"Department." The Department of Revenue of this Commonwealth.
"Gross Income." The value proceeding or accruing from the sale of tangible personal property, including all receipts, cash and credits, without any deduction on account of the cost of the property sold, the cost of materials used, labor or service cost, interest or discount paid, or any other expense whatsoever.
"Sale." Any transfer, exchange or barter, in any manner or by any means whatsoever, for a consideration.
"Vendor." Every natural person, association, or corporation who or which sells tangible personal property to a consumer or to any person for any purpose other than for resale; but the term "vendor" shall not include farmers who sell their own farm products. Whenever used in any clause prescribing a fine or imprisonment, or both, the term "vendor," as applied to associations, shall mean the partners or members thereof, and as applied to corporations, the officers thereof.
The singular shall include the plural, and the masculine shall include the feminine and the neuter. Section headings shall not be deemed or construed to limit the text of the sections of this act.
If the vendor is still dissatisfied with the finding of the department, he shall have the right to appeal to the court of common pleas of the proper county within twenty days after notice of the determination of the petition is given to him by the department. If any vendor shall fail to give due notice of an intention to petition for reassessment or to file a petition for reassessment after due notice of his intention to do so, or to appeal to the court of common pleas, within the time and in the manner herein set forth, the right to do so shall be forever barred, and any such vendor so failing shall not thereafter be permitted, in a suit for the recovery of such tax, to set up any ground of defense which might have been determined either by the department or the court of common pleas as aforesaid: Provided, That nothing contained in this section shall be construed to grant to any such vendor the right to petition for reassessment or to appeal from estimated assessments made by the department for neglect or refusal to make a return within the time prescribed by this act: And provided further, That every appeal to the court of common pleas under this section shall specify all the objections to the assessment, and any objection not specified in the appeal shall not be considered by the court. In all cases of petitions for reassessment and appeals, the burden of proof shall be on the petitioner or appellant, as the case may be.
72 P.S. § 3282