Hi ivonne4,
Welcome to Community! The QuickBooks Online Accounting API allows you to build apps that you can use effectively for most customer-facing features. I'll be happy to provide more information so you're on the right track with your QuickBooks Goals!
As you develop your app, you'll experience several concepts and workflows that are unique to QuickBooks Online. Here's how to get started!
In addition, click here to learn more about what you can do with the QuickBooks Online Accounting API.
Please feel free to contact us with any other questions. We'd be glad to assist!