| If        a person, liable to pay tax has wilfully failed to get himself enrolled,        then without prejudice to the action that my be taken against him under        sub-section (5) of Section 6, the assessing authority shall after giving        that person a reasonable opportunity of being heard and after such        enquiry, as may be deemed fit, or otherwise, assess the tax due to the        best of its judgment and serve on him a notice of demand in Form XIV to        pay the tax within fifteen days of receipt of the notice. Notice of        hearing in such a case shall be issued by the assessing authority in Form        XIII. The notice under sub-section (6) of Section 6 in respect of persons        liable for enrolment shall also be in Form XIII.
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