2) Select Registrations in the left hand navigation
3) Select the registration pool
4) Click the 3 dots quick action button and choose Refund/Cancel button.
5) Select Cancel without Refund or Cancel with Refund .
The user will receive a full refund of the payment amount; however, Stripe will retain the processing fees.If you would like to refund a partial amount, login to your Stripe dashboard and follow the Stripe tutorial here.