Good day to all!
I understand that you want to integrate TotalPass P600 Employee Time Clock to QuickBooks Online.
Please note that we do not directly support the mentioned third-party time clock. It's best to reach out to them so they can better assist you with it.
Also, you'll want to visit the Apps tab to see the list of supported third-party apps.
Keep on posting here if you have more questions. Have a great day!