I'm trying to allow users to attach tags to their post on one page but I am having a issue

When the user clicks the upload button on the home page, it creates the post and links to the upload post screen, then the user is allowed to upload certain tags to the post. this happens becasue the post is created and the create tag feature updates the current post. However, every time someone clicks the upload button on the home page a empty post is created. How do i set up a true/fals eproperty so this doesn’t happen and the user is still allowed to add tags to their post?