Remove Test Order from Google Analytic Data

Hi I have an online ecommerce platform. I have set up GA (Google Analystics) to track my sales. I have done several test orders in order to verify that GA is tracking correctly. Hence I would like to remove those test data from GA. I read article that it can be done. I need your help to do that. Refer to this site: [login to view URL] This describes us the steps to perform the reversal.