When you process a refund in WooCommerce (whether full or partial):

1. SemiAuto Invoicing automatically generates a dedicated Credit Note linked directly to the original invoice.
2. The Credit Note calculates the exact refunded tax breakdown and items.
3. In the Order Details screen, the Credit Note is nested neatly under the invoice with a dedicated download link.

If configured, the Credit Note PDF is automatically attached to WooCommerce's Refunded Order email sent to the customer.