Section 100 : Self-assessment of tax:
1) Section 99 shall be applicable in cases where the income return of any income year or any part of any income year has to be submitted pursuant to Sub-section (5) of Section 96.

2) Notwithstanding anything contained in Sub-section (1), in the circumstances mentioned in Sub-section (5) of Section 96, the Department may, based on the following amounts, assess the tax of that person in a justifiable manner:-

a) The amounts mentioned in sub-clauses (1), (2), (3) and (4) of clause (a) of Sub-section (2) of Section 96, for any income year or any part of that year,

b) The amounts due and payable under sub-clause (5) of clause (a) of Sub-section (2) of Section 96, for any income year or any part of that year.

3) The following provision shall be applicable in cases where tax is assessed pursuant to Sub-section (1) or (2 ):-

a) A person whose tax is assessed for the whole income year is not required to submit the income return referred to in Sub-section (1) of Section 96 for that income year, or

b) A person whose tax is assessed for a portion of any income year is required to submit the income return referred to in Sub-section (1) of Section 96 for that income year.

4) The amount of tax paid as per the assessment of tax for a portion of any income year may be adjusted to the tax chargeable as per the assessment of tax for the whole year.

5) In assessing the tax pursuant to this Section, the Department has to give a time limit of Seven days for the submission of proof and evidence for defense.