OSS Tax Codes, Tax Types, and Tax Control Accounts
In OneWorld accounts, NetSuite automatically creates OSS tax codes, tax types, and tax control accounts when you assign an OSS nexus to a subsidiary. This automatic provisioning requires the International Tax Reports SuiteApp. See EU One Stop Shop Tax Code Provisioning.
In accounts that aren't OneWorld, you create OSS tax codes by editing a custom record and running a script provided by the International Tax Reports SuiteApp. For detailed steps, see OSS Tax Code Provisioning for Regular NetSuite Accounts.
OSS tax codes for the other 27 EU countries include standard, reduced, and special reduced rates. You can inactivate OSS tax codes for countries where you're sure you won't get orders. If you expect sales from any EU country, don't inactivate any OSS tax code so the system calculates VAT correctly.
For information about how NetSuite determines the tax code to use on OSS transactions, see OSS Invoicing and Tax Rate Determination.