Tamil Nadu was among the first states to implement:

Tamil Nadu was among the first states to implement VAT (Value Added Tax). VAT is a consumption tax that is levied on the value added to goods and services at each stage of the production and distribution process. It is a destination-based tax, which means that the tax is levied in the state where the goods or services are consumed, not in the state where they are produced. VAT is a relatively new tax, and it was first introduced in India in 2005. Tamil Nadu was one of the first states to implement VAT, and it has been a successful implementation. VAT has helped to improve the efficiency of the tax system and to increase tax compliance. It has also helped to reduce the cascading effect of taxes, which is when the same tax is levied multiple times on the same goods or services.

GST (Goods and Services Tax) is a comprehensive indirect tax levied on the supply of goods and services in India. It is a destination-based tax, which means that the tax is levied in the state where the goods or services are consumed, not in the state where they are produced. GST was introduced in India on July 1, 2017. It is a single tax that has replaced a number of indirect taxes, including VAT, excise duty, and service tax. GST is a complex tax, and it has been a challenging implementation. However, it is a significant reform that has the potential to improve the efficiency of the tax system and to increase tax compliance.

Excise duty is a tax levied on goods produced or manufactured in India. It is a specific tax, which means that the tax is levied on the quantity of goods produced or manufactured, not on the value of the goods. Excise duty is levied by the central government. It is a major source of revenue for the central government.

Income tax is a tax levied on the income of individuals and businesses. It is a progressive tax, which means that the tax rate increases as the income increases. Income tax is levied by the central government and by the state governments. It is a major source of revenue for both the central government and the state governments.