Refund procedure: require bank advice, written intimation before adjustment, regional approval ceilings and interest entitlement. Require enclosure of bank advice with refund vouchers and prompt transmission to banks; CCITs to use RBI returns and inspections must comment on timeliness and address accuracy. Written intimation is mandatory before adjusting refunds against demands. CCIT/DGIT shall set regional monetary ceilings for prior superior approval of refunds, allowing separate ceilings for corporate and non corporate cases. Where superior approval is needed, the assessing officer must calculate and grant interest up to the date the voucher is signed after approval without separate sanction.