A tax may be defined as a "pecuniary burden laid upon individuals or property owners to support the government, a payment exacted by legislative authority. A tax "is not a voluntary payment or donation, but an enforced contribution, exacted pursuant to legislative authority". Taxes consist of direct tax or indirect tax, and may be paid in money or as its labour equivalent (often but not always unpaid labour). India has a well developed taxation structure. The tax system in India is mainly a three tier system which is based between the Central, State Governments and the local government organizations. In most cases, these local bodies include the local councils and the municipalities. According to the Constitution of India, the government has the right to levy taxes on individuals and organizations. However, the constitution states that no one has the right to levy or charge taxes except the authority of law. Whatever tax is being charged has to be backed by the law passed by the legislature or the parliament. Article 246 (SEVENTH SCHEDULE) of the Indian Constitution, distributes legislative powers including taxation, between the Parliament and the State Legislature. Schedule VII enumerates these subject matters with the use of three lists; • List-I entailing the areas on which only the parliament is competent to makes laws, • List-II entailing the areas on which only the state legislature can make laws, and • List-III listing the areas on which both the Parliament and the State Legislature can make laws upon concurrently. Separate heads of taxation are provided under lists I and II of Seventh Schedule of Indian Constitution. There is no head of taxation in the Concurrent List (Union and the States have no concurrent power of taxation). Any tax levied by the government which is not backed by law or is beyond the powers of the legislating authority may be struck down as unconstitutional. The thirteen heads List-I of Seventh Schedule of Constitution of India covered under Union taxation, on which Parliament enacts the taxation law, are as under: • Taxes on income other than agricultural income;