Hello.
You may open the Gantt view for the project and select the plan vs actual view.
For reporting purposes, I would invite you to look at the reports module which contains many reports out of the box.
You also have the capability of exporting the content of a view to excel, as well as build charts in Clarizen (in your views as well)
Finally, for more powerful reporting and dashboard capabilities, I would invite you to look at our Excel add in
http://www.clarizen.com/appsmarketplace/item/Clarizen-Excel-Add-in