The current version of the Desktop SDK is 15.0. This version supports 64-bit SDK.
As an alternative to Intuit’s SDK, there are third-party development tools, most of which enable you to integrate an application and QuickBooks without working with the QuickBooks SDK. For more information, see Third-party tools.
The Desktop SDK is a self-extracting installer of approximately 240 MB. You must be logged in to your Intuit Developer account before you can download the installer or merge modules. If you are not logged in, you will be redirected to the sign-on page.
Next up, run through the basic steps of using the SDK with the SDKTestPlus3.