Goods and Services Tax expands input tax credit and eliminates cascading to create a unified, consumption based national tax system. GST is a destination based consumption tax that subsumes multiple indirect levies into a single framework and enables cross stage set off to eliminate cascading taxation. It institutes uniform definitions, consolidated registration and return procedures, a centralized electronic portal for compliance, and mechanisms treating exports as zero rated while subjecting imports to an integrated tax to preserve parity with domestic supplies.