Once the discount is created in Bulk Discount Code Bot, the discount set will be available in your Shopify admin on the Discounts page.
To edit the discount details:
From your Shopify Admin, go to the Discounts page.
Select the discount.
Edit the details, and click Save.
Note: The discount details can not be changed after the discount codes are used.
Editing the discount type
Shopify does not support changing the discount type after the discount has been created. To change the discount type, you will need to create a new discount set.