After the tests have been defined you need to execute them in order to get a test form which you can fill out with the actual test results.
This can be done either through the share menu of the test case or inside the test run folder which holds the executed test cases.
Creating a test form from a test case
Creating a test run with multiple test forms
1) create or select the folder in which you want to create the test forms
2) Click on Create Test Forms and select the Test and Use Cases you want to include (either manually or via Search or MRQL):
3) optionally enter a version number or device ID and assign a tester (these fields can be changed in the configuration):
Note: at this step, if you're using some labels in your Test Forms category, you'll be able to filter them based on selected labels.