The development of reports in Dynamics NAV is done with different tools. You use the report dataset designer to create the dataset, which opens from the object designer in the Dynamics NAV Development Environment. You can choose to use either Visual Studio or Report Builder to create the layout.
Depending on your version of Dynamics NAV you will have to use different versions of Visual Studio.
You use Report Dataset Designer in the Microsoft Dynamics NAV Development Environment to define the dataset of a report. This is how you open it: