If you are a new user, locating your serial number depends on how you purchased AccountEdge. If you purchased a physical CD in a box, either from AccountEdge.com or a reseller, the serial number is located on the label of the CD case. If you purchased a download of AccountEdge, you will have received a confirmation sales order email with the serial number listed; then a short time thereafter, an email with a link to the download which again lists your serial number.
If you are upgrading from a previous version of AccountEdge, you would continue to use your current serial number. If you don't know it, there are a couple of ways to find your serial number. In pre-2010 versions of AccountEdge, while you have your company file open, select Company Information from the Setup dropdown menu (at the top of the screen). Your serial number will be displayed in the Company Information window. In AccountEdge versions 2010 or later (2009 or later in Canada), you can find the serial number of any registered product by clicking the link at the bottom, right-hand corner of the Welcome window, where it reads, "This Product Is Registered To". Clicking on this link will open the Registration window, where the registered company information, including the twelve digit serial number, will be displayed.
If you've already established a customer login (My Account) on the accountedge.com website, you can log in to review your customer information, which includes your product serial number(s). Your customer login is available by clicking on the login link at the top of the accountedge.com web page.