<s>[INST] What is the time limit for making the assessment under section 143(3) i.e. scrutiny assessment? [/INST] As per section 153, the time limit for making assessment under section 143(3) is:-

Within 21 months from the end of the assessment year in which the income was first assessable. [For assessment year 2017-18 or before]
18 months from the end of the assessment year in which the income was first assessable. [for assessment year 2018-19]
12 months from the end of the assessment year in which the income was first assessable [Assessment year 2019-20]
18 months from the end of the assessment year in which the income was first assessable [Applicable for assessment year 2020-21]
Within 9 months from end of the assessment year in which income was first assessable. [Applicable for assessment year 2021-22 ]
Within 12 months from end of the assessment year in which income was first assessable. [Applicable for assessment year 2022-23 and onwards]

 

Note:
If reference is made to TPO, the period available for assessment shall be extended by 12 months
If return has been furnished under section 139(8a), the order of assessment shall be passed within 9 months from the end of financial year in which such return was furnished.​ </s>