Thanks for the response, @DerrickFung.

Allow me to chime in and help share some information about importing price level list.

Importing price levels in QuickBooks Enterprise is not available at this time. However, I believe there are third party apps who can make this possible. 

You may try searching for an app on this link: Apps for QuickBooks Desktop.

Should you need additional information about price levels, please let me know. I'm here to help.