I am going to put tile in my bathroom. How do I remove the old flange so it will be at the right height? I do have access to the plumbing from the basement. Thanks for the help

"how do i remove the old flange so it will be at the right height?"
This would consist of taking up the floor to couple on a PVC raiser and to glue on a new flange. Fortunately you don't have that hassle to contend with. Just pick up a set of flange extenders(see image) and you're home free. Good luck, Tom