Nil Rated : It is the supply of goods and services that have 0% GST but allows you to claim ITC on inputs.
Example: Grains, salt, jaggery etc
Exempted : It is the supply of goods and services that does not attract GST and allows no claim on ITC.
Example: Bread, fresh fruits, fresh milk and curd etc
Zero Rated : made to any country other than India; supplies made to customers located in Special Economic Zones (SEZ) or SEZ Developers; and, supplies made as Deemed exports.
Non-GST : It is the supply of goods and services that does not come under the purview of GST while other taxes maybe applicable. Example: Petrol, alcohol etc