There are 2 names in this directory beginning with the letter U.
An UIN or Unique Identity Number is an ID that used to identify specialized agencies who are non-taxable in India. These agencies can be bodies of United Nations, consulates, foreign embassies or organizations that are exempted from taxation either by the UN or by our government(s).
UTGST is Union Territory Goods and Service Tax. This tax is chargeable on transactions between same union territories.