If, at previous step, you have chosen to Use the Query Language, the Reports Wizard window will look different:

Reports Wizard window screenshot

Enter your SQL (Transact-SQL dialect) query in the top pane of the window, using the bottom pane to define the query parameters (local variables) whose values the user will be prompted to enter when the query is executed.

Now you can save your report.

The result you can see on the screenshot below: