Use this feature before uninstalling to clean up the metaobjects and metaobject definitions that Magical Fees creates your store data. This will permanently delete all fee metaobject data from your store. This action can't be undone.
Go to your Shopify Admin > Apps > Magical Fees.
Click Settings in the left sidebar.
Scroll to the App data section.
Click Delete metaobject definitions
Review the warning and click Delete
Your fee data is now permanently deleted from your store. After deleting you can uninstall the app.