changes in html are not working

I do the online quizzes which give me HTML code so I can post the results on my site. However, I have a code in particular that keeps adding several tags at the top of the post, so that after the title, I have all this blank space. When I go back to edit the post, and I remove all the tags and hit save…It does NOT save it! It reverts back. Help.

I have tried deleting that in the standard editor, but it also does not save the changes I make.