Trade and Investment related links in India:
Department of Commerce (link to https://www.commerce.gov.in/)
Director-General of Foreign Trade (link to https://www.dgft.gov.in/CP/)
Central Board of Indirect Taxes and Customs (link to https://www.cbic.gov.in/)
Department for Promotion of Industry and Internal Trade (DPIIT) (link to https://www.dpiit.gov.in/)
Invest India (link to https://www.investindia.gov.in/)