Here is how you can fetch coupon codes from your Stripe account:
1. Open your form in the Form Builder and then click on the wizard icon near your Stripe integration question.
2. On the first page of the Stripe Wizard, click on the “Additional Settings” button:
3. Then, enable the Fetch From Stripe Feature:
Once you complete this, your Stripe Form should start accepting the coupon codes you entered in your Stripe account.
Please give this a try and if you have any questions please let us know.