OSS Invoicing and Tax Rate Determination
As a seller, you need to know the rules in every EU country where you make B2C supplies.
Your invoices must comply with each EU member state’s VAT invoicing rules.
This compliance requirement means that, in many countries, you can't have both OSS and non-OSS transactions on the same invoice.
On web stores, an error message pops up when a customer tries to include a non-OSS service with OSS goods or services in the same order. The customer must place two separate orders.
If you use SuiteCommerce Site Builder, you can customize the web store popup message. For more information about customizing web store error messages, see Customizing Website Text.
The tax rate to be applied to web store orders for services is determined by the customer’s IP and billing address. These are the two pieces of evidence required under the OSS legislation. Orders for services which aren't created through e-commerce use the Bill To address of the customer to determine the tax rate. Orders for goods use the customer’s Ship To address to determine the tax rate.
Customers identified for OSS don't have a VAT registration number on the customer record, and belong to a subsidiary that's marked for OSS with an OSS nexus. On OSS transactions, the default tax code on the customer record won't be applied. Instead, the system will apply the appropriate OSS tax code for the customer’s country. So you don't need to change the default tax code on the customer record.
NetSuite provisions all tax rates, including standard, reduced, and super reduced, where applicable, and automatically applies the standard rate on transactions. You 'll need to manually apply any reduced rates to transactions.