166Rectification of mistake.

(1) With a view to rectifying any mistake apparent from the record, the Assessing Officer may amend any intimation issued under section 168, within one year from the end of the financial year in which the intimation sought to be amended was issued.

(2) The Assessing Officer may make an amendment to any intimation under sub-section (1), either suo motu or on any mistake brought to his notice by the assessee.

(3) An amendment to any intimation, which has the effect of increasing the liability of the assessee or reducing a refund, shall not be made under this section unless the Assessing Officer has given notice to the assessee of his intention so to do and has given the assessee a reasonable opportunity of being heard.

(4) Where any such amendment to any intimation has the effect of enhancing the sum payable or reducing the refund already made, the Assessing Officer shall make an order specifying the sum payable by the assessee and the provisions of this Chapter shall apply accordingly.