The website ctd.tn.gov.in is the official portal of the Commercial Taxes Department, Government of Tamil Nadu, India. It provides information and services related to the state’s tax administration, including Goods and Services Tax (GST), Value Added Tax (VAT), Central Sales Tax (CST), and other tax-related matters. The site offers resources like tax forms, e-Services for filing returns, tax payment, dealer registration, notifications, circulars, and access to the latest updates and policies.