shopify checkout missing discount code box

The actual problem

Checkout Extensibility or apps hide the discount field, so promised codes fail and support spikes.

Do this

1. Open checkout as a customer; confirm discount entry is visible.
2. Checkout editor: re-enable discount field / remove blocking apps.
3. Test the top campaign codes end-to-end on mobile.
4. Update ads only after codes apply at checkout.

Tools for this job

• Tillkiln

  Discount stacking + checkout path audit

• Shopify Discount Docs

  Checkout discount UX rules

Related intents

• shopify checkout extensibility blocks place order
• shopify discount codes stacking unexpectedly