Union Budget 2026 revises customs duties, consolidates exemptions, tariffises lines, and amends GST and customs procedures. Union Budget 2026 proposes amendments to customs, central excise and GST by the Finance Bill, 2026 and accompanying notifications: widespread BCD rate revisions, tariff consolidation/tariffisation into the First Schedule, creation of new tariff items, extensions/lapses of numerous exemptions (many extended to 31 March 2028 or lapsed 31 March 2026), selected specific and ad valorem duty adjustments, addition of medicines and rare diseases to exemption lists, procedural changes to deferred duty payment and baggage rules, amendments to Customs Act (including fishing beyond territorial waters and advance ruling validity), central excise valuation and NCCD adjustments, and GST amendments on discounts, refunds and advance ruling appeal mechanism.