4You should caulk your toilet to floor to prevent water from seeping under the base of the toilet. However, you should leave a small gap at the back of the toilet so that you can when your toilet is leaking to avoid rotting/damage of the floor and basement ceiling. Sure here you will get all details of this. https://toilethaven.com/2020/03/21/caulk-around-a-toilet/ and sure https://toilethaven.com/ presents all about more toilets.
