Deduction under section 80C for housing loan repayment requires completion and chargeability to house property income. Deduction for repayment of loans for purchase or construction of residential property is allowable only if the property's construction is completed after the cut-off date and the income from the property is chargeable to tax under Income from House Property in the relevant assessment year; if construction remains incomplete by the end of the previous year relevant to an assessment year, no deduction is admissible for that assessment year and TDS should be applied accordingly.