Finding the right category. In the screenshot below, you can see a category that is commercial and thus does not accept submissions from Zeal. I've drawn a red box around the word "commercial" so that it catches your attention.
The category below is noncommercial, so you can freely submit to it. As you can see, the space where the word "commercial" was in the picture above is empty, which is how you can tell these two types of categories apart.
