Tax collection at source requires sellers to collect from buyers of specified goods, with compliance duties and penalties. Sellers of specified goods must collect income tax at source at prescribed percentages at the first sale; the obligation excludes certain buyers and second or subsequent sales. Collectors must remit amounts within seven days, issue prescribed certificates enabling buyer credit, and file half yearly returns in specified forms. A buyer's Assessing Officer certificate for manufacture/use exempts the transaction from collection while valid. Failures to collect, remit, issue certificates, or file returns attract interest, daily penalties subject to a cap, surcharges based on buyer type, and potential criminal sanction for non remittance.