Is it possible to delete a UPI ID permanently

Yes, you can delete a UPI ID. Think of a UPI ID like a special address for your bank account that helps you send and receive money. If you have too many of these addresses and don't use some of them, you can remove the ones you don't need anymore. This makes it easier to keep track of your active UPI IDs. The way you delete it might be a little different depending on the app you use, but generally, it's a simple process within the app.