Regular assessment refers to the process of determining your income tax liability, particularly when you receive a demand notice from the Income Tax department. If additional tax is required, it's deposited under 'Tax on regular assessment'. This type of assessment is defined under Section 2(40) and includes scrutiny assessments conducted under Section 143(3) of the Income Tax Act.
Income Tax payable under Notice on Demand from Income Tax department , When notice is received and found that additional Tax required to be paid , same shall be deposited under " Tax on regular assessment " .