QuickBooks no longer uses registration numbers. The license number you received when you purchased QuickBooks
takes the place of what was formerly known as a "registration" number.
You can find your license number on a sticker with your CD or by going to the
Help menu and clicking About QuickBooks.
You can verify that your copy of QuickBooks is registered by pressing
the F2 key when QuickBooks is open. The
Product Information window displays either REGISTERED or UNREGISTERED based on the registration status.
Move your QuickBooks installation
Register QuickBooks if you are installing on a new computer