Hello @Midwest1 thank you for reaching out to us here at The Community, my name is Sherissa and I am more than happy to assist you today.
It sounds like you have the invoicing Add-on in your TSheets Account installed, you will want to uninstall that before being able to start your TSheets & QuickBooks Integration.
- Login to your TSheets Account
- Go to Feature Add-ons
- Then to Manage Add-ons
- Locate the Invoicing option and Uninstall
After going through those steps you will be able to start your TSheets and QuickBooks Integration!
If you need anything else please don't hesitate to reach back out to us here at The Community.