Is it possible to use HTML tags on the Customer Facing Info description?
Yes, it is possible to add HTML tags on the Customer Facing Info description only on Notes but not on the description of the invoice. The HTML <a href="https://www.yoursite.com">Visit mysite.com!</a> element produces a link on the Invoice notes. Your customers can access the portal link or any link from the invoice PDF.
Navigate to Settings > Configure Chargebee > Customize Invoices, Credit Notes, and Quotes > Invoices
The invoice notes given above will appear on the invoice with a link, as shown below: