If you are referring to adding links to text in a PDF, you can refer to the helpx article, which has detailed steps on how to accomplish the task: https://adobe.ly/3EyC3Nu.
If you are referring to the tagging structure of a PDF, you can learn more on how to do so through this article: https://adobe.ly/3YEeQjR.
If this is not what you are referring to, please feel free to write back, and we will be happy to assist you further.
p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.