Hi and Welcome to the forum, you might want to have a look at the following FAQ which explains where everything is
Welcome to Benefits and Work There does not seem to be much (any?) consistency regarding which form is sent to claimants for renewal. I can only advise that you make as good a job of filling in the form as possible. Treat this as you did your first application and do not assume that the assessor has any prior knowledge of you.
Don't forget to make good use of the PIP guide
www.benefitsandwork.co.uk/help-for-claimants/pip May I suggest that you bookmark/favourite this on your web browser now so that you can find it easily in future? This will allow you to return with further questions or comments about your PIP without having to start a new topic each time. We ask members to keep everything relating to the same claim in one topic as it helps us enormously - and I hope you will find it useful too