No, Magical Product Fees does not support custom checkout builds.
The app is designed to work with Shopify’s standard checkout and POS systems. It does not integrate with custom checkouts.
If you’re using a custom checkout, the app’s features, including fee application and display, will not function as intended.
Always label deposits separately for compliance
Display bottle deposit fees as a clearly labeled, separate line item at checkout and on receipts. This meets regulatory transparency requirements, builds customer trust by showing exactly what they're paying, and makes it significantly easier to track deposits for reporting and audits. Use a clear label like "Bottle deposit" or "Container deposit (CRV)" so customers immediately understand the charge.
Originally from our Help Center