The document discusses TDS (Tax Deducted at Source) and TCS (Tax Collected at Source) under GST (Goods and Services Tax), outlining their definitions, functions, and implications for both buyers and sellers. TDS is aimed at direct taxation for services and goods, whereas TCS applies to online sales transactions, impacting e-commerce platforms. Both systems are intended to enhance transparency and compliance in tax collection and necessitate adjustments by online sellers in their payment processes.