Integrate Stripe with your Odoo POS system by following these steps:

1. Go to Point of Sale → Configuration → Payment Methods
2. Click Create to add a new payment method
3. Set the name as "Stripe"
4. Select Stripe Payment Gateway in the corresponding field
5. Enter your Stripe API keys (publishable key and secret key)
6. Click Save to complete the configuration

Install the POS Stripe Refund module to enable refund functionality:

1. Go to the Apps menu in your Odoo dashboard
2. Click on Update Apps List to refresh available modules
3. Search for "POS Stripe Refund"
4. Click Install to add the module to your system
5. After installation, restart your POS session to apply the changes

To process a refund, first locate and select the order:

1. Open your POS interface and click on the Refund button
2. Browse through the list of orders displayed on the refund screen
3. Select the specific order you want to refund
4. Choose the items and quantities to be refunded
5. Click Confirm to proceed with the refund

After selecting the order, proceed to the payment section:

1. The system will automatically create a refund order with negative amounts
2. Review the refund details to ensure accuracy
3. Click on the Payment button to proceed to payment processing

Complete the refund process using Stripe:

1. Select Stripe as the payment method
2. Verify the refund amount is correct
3. Click on the Refund button to process the transaction
4. The system will communicate with Stripe to process the refund
5. Wait for confirmation that the refund has been processed

After processing the refund, verify its status:

1. Navigate to the Orders section in the POS interface
2. Locate the refunded order, which will be marked accordingly
3. Check that the refund status shows as Completed
4. Verify that the refund amount matches what was processed