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After the government publishes a reliable translated text in English through an official gazette, we will incorporate the Authentic English Text here.

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65.Computation of advance tax: 

(1) The minimum amount of advance tax payable by an assessee in a financial year shall be the amount equal to the tax payable on his total income of the latest income year as assessed on regular basis or provisionally, as the case may be, as reduced by the amount of tax required to be deducted or collected at source in accordance with the preceding provisions of this Chapter.

(2) The tax payable under sub-section (1) shall be calculated at the rates in force in respect of the financial year referred to therein.

66.Instalments of advance tax: 

Advance tax shall be payable in four equal instalments on the fifteenth day of September, December, March and June of the financial year for which the tax is payable:

Provided that, if before the fifteenth day of May of the year, an assessment of the assessee is completed in respect of an income year, later than that on the basis of which the tax was computed under section 65, the assessee shall pay in one instalment on the specified date or in equal instalments on the specified dates, if more than one falling after the date of the said assessment, the tax computed on the revised basis as reduced by the amount, if any, paid in accordance with the original computation.

67.Estimate of advance tax: 

(1) Where, an assessee who is required to pay advance tax under section 64 estimates, at any time before the last instalment is due, that the tax payable by him for the relevant assessment year is likely to be less than the amount of tax as computed under section 65, he may, after giving to the Deputy Commissioner of Taxes an estimate of the tax payable by him, pay such estimated amount of advance tax, as reduced by the amount, if any, already paid, in equal instalments on the due dates of payment under section 66.

(2) The assessee may furnish a revised estimate of such amount at any time before any of such instalments become payable and may thereby adjust any excess or deficiency, by reference to the amount already paid by him under this section, in any subsequent instalment or instalments payable in such financial year.