selling textile machinery and spares. They are a dealer registered under the provisions of the Tamil Nadu General Sales Tax Act (in short, the Act) on the file of the second respondent. For the assessment year 1991-1992, the petitioner submitted their return of income and it was accepted by the second respondent on 31.10.1994. Subsequently the second respondent initiated revised assessment proceedings and passed an order dated 03.12.2001 for the assessment year 1991-1992 making a revision of assessment under Surcharge Act at 12%. Originally, the petitioner was assessed under Surcharge Act at 10% and by the revision of assessment, the second respondent levied differential rate of tax at 2% raising an additional demand of Rs.4,02,813/-. Aggrieved by the order dated 03.12.2001, the petitioner filed A.P. No. 99 of 2001 before the Appellate Deputy Commissioner (CT), Coimbatore and it was allowed on 02.05.2002 holding that the rate of surcharge levied at 12% is unsustainable and the claim of the petitioner for assessment of surcharge at 10% is proper.