If you need to renew a personal trainer certification you should contact the agency with whom you certified, e.g. ACE, or ACSM, or so on.
If you need to get CECs to renew a certification you can do that through Ideafit by clicking on the CECs/CEUs at the top. You just need to make sure your certifying agency accepts the credits.
I am not familiar with licensure for trainers. When I was training there was no requirement for a license. If it is the case in PR you should probably check with your local government licensure board.