61. Assessment of unregistered persons
Notwithstanding anything to the contrary contained in section 66 or section 67 ,
where a taxable person fails to obtain registration even though liable to do so, the
proper officer may proceed to assess the tax liability of such taxable person to the
best of his judgement for the relevant tax periods and issue an assessment order
within a period of five years from the due date for filing of the annual return for the
year to which the tax not paid relates:PROVIDED
that no such assessment order shall be passed without giving a notice to
show cause and without giving the person a reasonable opportunity of being heard.