Hi ceejaycharles,
Thanks for reaching out!
At the moment there is no direct way to edit the attendee list.
Depending what you need to do you will either need to dig into the database or change some custom field values.
If you are using WooCommerce and you would like to adjust the number of sold tickets, then you will need to open the WooCommerce ticket product, make the custom fields show (screenshot), and change the value in the ‘Total Sales’ custom field (screenshot).
Let me know if you need further help. Also in that case please share your system information with me.
Cheers,
Andras