You create the Test Cases in the Test Plan Tab and link them to the requirements in the requirements Tab. Once the Test Caseis Ready..u change the status to ready and goto the Test Lab Tab and create a Test Set and add the test cases to the test set and you can run from there.

For Automation...In Test Plan ...create a new automated test and launch the tool and create the script and save it and you can run from the Test lab the same way as you did for the Manual test cases..

To answer your question...the test cases are stored in Test Plan Tab...or more precisely...in the TestDirector..Lets say Quality Center 's database

TD is now referred to as QualityCenter

Hi

If u mean to say that how we can upload the test cases from excel sheet to TD.

For this purpose we need install an ADD-IN called Microsoft Excel Add-In.Once the Test cases are created in the Excel Sheet u can directly upload the test cases into the TD/QC from Excel sheet by selecting IMPORT To Test Director from Tools Tab.

After giving all the correct details for the asked questions we can find the test cases saved in the Test Plan Tab.

and then from there u can move the test cases to Test Lab for executing.

let me know if I were wrong :)