Are you thinking about starting racing? Ask about future events in here, find out what you can expect at them and who else is going so you can scrounge a lift off someone rather than riding the 30 miles to get there yourself!
Then work through the menus: About CTT, Rider Info, Forms & Guidance Notes And the one you need for most events is "Entry Form (Front Only)" - you only need t'other side for hillclimbs and team time trials.
I'd be quick as most TT entrys close 10 days before, give a day or two before the event. The organiser actually lives on your way to work Paul, so you could drop it in by hand