Scrape off the old wax ring from the flange, toilet base, and floor using a putty knife. Inspect the flange for cracks, rust, ...
or a damaged toilet flange. Some people assume they need to replace the toilet, when it usually requires a quick fix any DIYer can handle. The toilet I worked on wobbled because of loose bolts.
If the toilet is wobbly, the floor flange is probably broken and needs to be replaced, which requires removing the toilet. Anytime someone pulls (removes) a toilet from the flange or is replacing ...