Notice of demand24 :
Section -156. When any tax, interest, penalty, fine or any other sum is payable in consequence of any order passed under this Act, the Assessing Officer shall serve upon the assessee a notice of demand in the prescribed form25 specifying the sum so payable :
Provided that where any sum is determined to be payable by the assessee or the deductor or the collector under sub-section (1) of section 143 or sub-section (1) of section 200A or sub-section (1) of section 206CB, the intimation under those sub-sections shall be deemed to be a notice of demand for the purposes of this section.