You want to create an entity/use code in NetSuite after enabling them.
To create an Entity/Use Code in NetSuite:
- Navigate to AvaTax > Setup > Entity/Use Code.
- Add an entity/use code by clicking New.
- Once added, the new entity/use code is available for mapping to customer addresses.
Note: New entity/use codes may also be added as needed using the Entity Use Code field in the Customer Address record.
Entity/use codes allow users to designate a customer as exempt from sales/use tax.