Hello!!! Where can i find my INVOICE????
If you have just purchased a product directly from Norton, you should have received an email with the product key. That email would also be your invoice/receipt.
You can also log into your Norton Account at https://my.norton.com Then click on the use icon at the top right and click on My Subscriptions. Then you can click on the Order History tab. That should list any purchases you have made directly from Norton.