23. Assessment.—(1) If the Income-tax Officer is satisfied
[without requiring the presence of the assessee or the production by him of any evidence] that a return made under section 22 is correct and complete, he shall assess the total income of the assessee, and shall determine the sum payable by him on the basis of such return.(2) If the Income-tax Officer
[is not satisfied without requiring the presence of the person who made the return or the production of evidence that a return made under section 22 is correct and complete, he shall serve on such person] a notice requiring him, on a date to be therein specified, either to attend at the Income-tax Officer's office or to produce, or to cause to be there produced, any evidence on which such person may rely in support of the return.(3) On the day specified in the notice issued under sub-section (2), or as soon afterwardsrtfs may be, the Income-tax Officer, after hearing such evidence as such person may produce and such other evidence as the Income-tax Officer may require, on specifieu points, shall, by an order in writing, assess the total income of the assessee, and determine the sum payable by him on the basis of such assessment.(4)
[If any person fails to make the return required by any notice given under sub-section (2) of section 22 and has not made a return or a revised return under sub section (3) of the same section] or fails to comply with all the terms of a notice issued under sub-section (4) of the same section or, having made a return, fails to comply with all the terms of a notice issued under sub-section (2) of this section, the Income-tax Officer shall make the assessment to the best of his judgment
[and determine the sum piytroie by the assessee on the basis of such assessment]
[and,
[in the case of a him, may refuse to register it or may cancel its registration if it is already registered]]:
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