(2)The Assessing Officer, after considering such accounts, documents or other evidence, if any, as he has obtained under sub-section (1) and after taking into account any other relevant material which he has gathered, shall, by an order in writing, assess the value of taxable commodities transactions during the relevant financial year and determine the commodities transaction tax payable or the refund due on the basis of such assessment:Provided that no assessment shall be made under this sub-section after the expiry of two years from the end of the relevant financial year.