2025Section 533
533. Power to make rules.
(2) In particular, and without prejudice to the generality of the foregoing power, such rules may provide for all or any of the following matters:—
(h) the time within which any person may apply for the allotment of a Permanent Account Number, the form and the manner in which such application may be made and the particulars which such application shall contain and the transactions with respect to which Permanent Account Number shall be quoted on documents relating to such transactions under section 262;
(j) the class or classes of persons who shall be required to furnish the return of income in electronic form; the form and the manner of furnishing the said return in electronic form; documents, statements, receipts, certificates or reports which shall not be furnished with the return in electronic form and the computer resource or electronic record to which such return may be transmitted under section 263(2)(a);
(u) the procedure for calculating interest payable by assessees or by the Government to assessees under this Act, including the rounding off of periods when a fraction of a month is involved, and specifying the circumstances under which and the extent to which petty amounts of interest payable by assessees may be ignored;
(3) In cases falling under sub-section (2)(b), where the income liable to tax cannot be definitely ascertained, or can be ascertained only with an amount of trouble and expense to the assessee, which is unreasonable, the rules made under this section may—
and an assessment based on such estimate or proportion shall be deemed to be duly made as per this Act.
(4) The power to make rules conferred by this section shall include the power to give retrospective effect, from a date not earlier than the date of commencement of this Act, to the rules or any of them and, unless the contrary is permitted (whether expressly or by necessary implication), no retrospective effect shall be given to any rule so as to prejudicially affect the interests of assessees.