You can now add the RUT in Shopify billing

Shopify is required to collect value added tax (VAT) in Chile. Since your business address is in Chile, starting December 31, 2021, your Shopify invoices will include the corresponding VAT. However, your Shopify invoices may be exempt from this tax if you are registered in Chile and enter a valid tax identifier (RUT).

To include your Rut in Shopify you must go to:

and add the RUT of your company