Hello  Paul Farrell,

To set up Odoo so that export customers (e.g., customers from Northern Ireland) are charged 0% VAT automatically, you need to configure your system correctly with the right fiscal position and tax settings. 

Here's how you can set it up:

1. Create a 0% VAT Tax Rule:
   • First, create or verify the existence of a 0% VAT tax rule for export customers.
2. Create a Fiscal Position for Export Customers:
   • Define a fiscal position that automatically applies 0% VAT to customers based on their country or VAT registration.
3. Assign the Fiscal Position to the Customers:
   • Ensure that the correct fiscal position is applied to the export customers so that the VAT is automatically set to 0% without manual changes.

Step-by-Step Guide:

Step 1: Create or Verify the 0% VAT Tax

1. Go to Invoicing > Configuration > Taxes.
2. Click Create to set up a new tax or check if a 0% VAT tax already exists.
3. Configure the new tax as follows:
   • Tax Name: 0% VAT (or something similar).
   • Tax Scope: Select Sales.
   • Tax Computation: Select Percentage of Price.
   • Amount: Set this to 0%.
4. Save the tax rule.

Step 2: Create a Fiscal Position for Export Customers

1. Go to Invoicing > Configuration > Fiscal Positions.
2. Click Create to create a new fiscal position for export customers.
3. Configure the fiscal position:
   • Fiscal Position Name: Export to Northern Ireland (or something similar).
   • VAT Required: Check this if customers need to be VAT-registered.
   • Country: Set this to Northern Ireland (UK) or any specific country you are exporting to.
4. Tax Mapping: Under the Tax Mapping section, map the regular VAT tax to the 0% VAT tax:
   • Click Add a line under the Tax Mapping tab.
   • Tax on Product: Select your local VAT tax (e.g., 23% VAT for Ireland).
   • Tax to Apply: Select the 0% VAT tax you just created.
5. Save the fiscal position.

Step 3: Assign Fiscal Position to Export Customers

1. Go to Sales > Customers and open the customer record for the export customer (e.g., a customer in Northern Ireland).
2. Under the Sales & Purchase tab, look for the Fiscal Position field.
3. Select the fiscal position you created (e.g., Export to Northern Ireland).
4. Save the customer.

Step 4: Test the Setup

1. Create a new sales order for the customer.
2. Add products to the order and check that the VAT is automatically set to 0% based on the fiscal position.
3. Confirm that the system applies the 0% VAT without requiring manual changes for each line.

Let me know if it helps :).