Withholding tax on contractor payments expanded, payment and return timelines tightened and recovery powers strengthened. The Amendment broadens the definitions of dealer and capital goods, tightens payment and return obligations including mandatory net tax payment within twenty-eight days, authorises electronic filing and notices, clarifies works contract taxation including exclusion where goods supplied by contractee remain owned by contractee, prescribes input tax credit adjustments on transfer of capital goods and partial use, expands withholding obligations on payments to contractors and subcontractors with remittance and certification timelines, creates presumptions and penalties for exhibition-cum-sale organisers, and enhances recovery, provisional attachment and first-charge powers to protect revenue while providing revision and rectification mechanisms and specified penalties for defaults.