25. Procedure to be followed in assessment of certain cases.

(1) If any dealer who is liable to pay tax under this act fails to submit return within the prescribed period, or if the return submitted by him appears to be assessing authority to be incomplete or incorrect, the assessing authority may, after making such enquires as it considers necessary, determined provisionally the tax payable by the dealer to the best of its judgment—

Prior to its substitution by Section 5 of the Fifth Amendment Act 23 of 2012 ( effective from a date to be *notified) this sub-section read as under:-

 25. Procedure to be followed in assessment of certain cases.--(1) If no return is submitted by the dealer under section 21 within the prescribed period, or if the return submitted by him appears to the assessing authority to be incomplete or incorrect, the assessing authority may, after making such enquiry as it considers necessary, determine the tax payable by the dealer to the best of its judgement:

Provided that, before taking action under this sub-section on the ground that the return submitted by the dealer is incomplete or incorrect, the dealer shall be given a reasonable opportunity of proving the correctness or completeness of the return submitted by him.

 (2) If the assessing authority has reason to believe that the tax determined by it for any period was based on too low a turnover or was made at too low a rate or was based on too high a turnover or was made at too high a rate it may enhance or reduce, as the case may be, such determination of tax: Provided that before making an enhancement of the tax payable as aforesaid, the assessing authority shall, give a reasonable opportunity to the dealer to show cause against such enhancement and make such enquiry as it may consider necessary.

(3) The determination and collection of tax under this section shall be subject to such adjustment as may be prescribed on the completion of assessment in the manner prescribed