Section 14A(1) in Andhra Pradesh General Sales Tax Act, 1957
(1)Notwithstanding anything contained in Section 14-(a)if a dealer receives in any year any amount due to price variations which would have been included in his turnover for any previous year if it has been received by him in that year, he shall within thirty days from the end of the year in which such amount is received submit a return in such form as may be prescribed to the assessing authority and thereupon the assessing authority shall proceed to assess the tax payable on such amount;(b)If the assessing authority is satisfied that any return submitted under clause (a) is correct and complete, he shall assess the amount of tax payable by the dealer on the basis thereof, but if such return appears to him to be incorrect or incomplete, he shall after giving the dealer an opportunity of proving the correctness and completeness of the return submitted by him and after making such inquiry as he considers necessary and taking into account all relevant materials gathered by him, assess to the best of his judgment, the amount of tax due from the dealer. An assessment under this clause, shall be made only within a period of three years from the expiry of the period within which such return ought to have been submitted; and(c)if no return is submitted by the dealer under clause (a) within the period of thirty days aforesaid, the assessing authority may at any time within a period of six years from the expiry of the period within which such return ought to have been submitted after issuing a notice to the dealer and after making such inquiry as he considers necessary, assess to the best of his judgment the amount of tax due from the dealer on the amount referred to in clause (a).