Rounding of tax amounts requires fractional parts at or above half to be rounded up to the nearest whole unit. Amounts payable or refundable under the Act are to be rounded to the nearest whole rupee; fractional parts equal to or exceeding half a rupee are increased to the next rupee, while fractional parts less than half a rupee are ignored, and this rule applies to tax, interest, penalty, fine and any other sums payable and to refunds and other sums due.