S. 143(3) : Assessment-Principles of natural justice-Opportunity of being heard-Notices sent to email address available on MCA website-Assessee having participated in assessment proceedings precluded from objecting to service of notice-No violation of natural justice-Writ petition dismissed. [S. 142(1), 282, 292BB, R. 127(2)(b)(iii) of the Income-tax Rules, 1962, Art. 226]