I uploaded my family tree and people have made changes to it that are wrong. Can I delete this tree and upload it again??
Because the Family Tree at FamilySearch.org is one big shared tree and not your own personal tree you cannot delete the tree and start over. However, you can delete any people that you added if no one else has made changes to that person's record. If you added incorrect information or formed incorrect relationships you can edit the information or correct the relationships. Here are a few articles from the Help Center that will help you. (Click the question mark in a circle at the top to find the Help Center):
You might also want to contact FamilySearch Support by phone. Click the question mark in a circle at the upper right and then click Contact Us.
@KarenLeVier As @886EZL mentioned, the FamilySearch Tree is one large public and collaborative tree.
If you want to upload a tree to FamilySearch.org that is your tree only, you can upload your GEDCOM to the Genealogies section of the website. Scroll down the page from this URL to see instructions and explanations: https://www.familysearch.org/search/family-trees