Hi simon
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 I am assuming you are talking about PIP, as you said it was an on line claims form, If you are talking about NS ESA then the same will apply but look at our WCA guide.
Before you start filling out the on line claims form, have a look at out guide first, quite often claimants get refused PIP;
www.benefitsandwork.co.uk/help-for-claimants/pip If you have any further questions then please come back to the forum.
Gary