On utilisation of input tax credit of Union territory tax for payment of tax dues under the Integrated Goods and Services Tax Act in accordance with the provisions of sub-section (5) of section 49 of the Central Goods and Services Tax Act,

Notwithstanding anything to the contrary contained in section 73 or section 74 3[or section 74A], where a registered person fails to furnish the return under section 39 or section 45,

Provided that the period specified in this sub-section may, on sufficient cause being shown and for reasons to be recorded in writing, be extended by the Joint Commissioner or Additional Commissioner

Every registered person shall self-assess the taxes payable under this Act and furnish a return for each tax period as specified under section 39.