I have installed one quarter inch laminated floor in my bathroom and I put an over sized wax ring on my toilet but it still leaks. I was told to get an add a flange but do not know how it works. Help

You need to get a spacer and add it to flange see the image below, or thicker wax ring Thanks.

John

John has it, install spacers until you are flush with the new floor, then use a standard ring with a neoprene collar .