After QuickBooks is installed either you have done yourself or with QuickBooks activate support number ; you need to register and activate QuickBooks Software. Open QuickBooks and press F2 key on the keyboard on home screen, It will open Product Information screen, locate the activation status beside the License number. It will say either Activated which means you are all set to go! Or Not Activated, then click ok on product information screen. Now go to Help Menu and then select Activate QuickBooks, Then follow the onscreen information to verify details at the time of purchase. The easiest would be Zip Code of you billing address and then proceed to complete the activation process. In case you face issues call QuickBooks Support Numbers, QuickBooks Pro-Advisors will Help you activating QuickBooks.