Web TimeSheet functionality is not affected by upgrading QuickBooks from Premium 2009 to Enterprise 2011 if the application is hosted on the SaaS environment.If the application is hosted on premise, then care should be taken to compare if the version of QuickBooks Integration Manager installed is compatible with the latest version of QuickBooks.

The QuickBooks Integration Manager is dependent on the version of QB and Web TimeSheet. If Web TimeSheet is hosted by Replicon, then the application will always be on the latest build and hence the integration manager will communicate with QB 2011.