Hi loobysue and Welcome to the forum, you might want to have a look at the following FAQ which explain where everything is
Welcome to Benefits and Work I hope you made full use of our guide for your PIP claim!
Everyone who was under 65 in April 2013 will have to apply for PIP eventually. This would happen automatically if the claimant came to the end of their award or notified a change of circumstances. Otherwise they will be selected randomly.