There are two ways to navigate to another SSRS from a main Report
Action “Go to Report” Right-click on a TextBox, select Text Box Properties, select Action tab and select option “Go to report”. Click on “Browse” and select the SSRS Report from the report library. If the selected SSRS Report has parameters, click on “Add” to add parameter. From the “Name” dropdown select the parameter name and from the “Value” dropdown select the value to pass to the parameter.