How do can I add my project application in Katalon?

Hi Allen @mae, :wave:

Welcome to our forum.

While our community is eager to help you with your project, we would have a hard time doing so if not given sufficient information i.e. which type of testing are you looking at (mobile, web, desktop, etc.), your application under test, what you are hoping to achieve, screenshots, error logs, etc.

Please refer to the topic below so that you can detail your topic better:

Thanks,
Albert