To be fair, well-designed online forms are far, far easier to fill out than the equivalent paper forms. Anyone filling in a paper tax return, for example, has to wade through page after page of irrelevant questions in order to do so. When you do it online there are a few 'filtering' questions at the start, so that you only have to answer questions which actually apply in your situation.
It's the same with council forms. When I went to my local council offices to get a form requesting a reduction in my council tax I was, like Emmie, told I had to do it online. When I actually did so I found that the process was vastly simpler than it used to be (in the days of paper forms) because of the 'filtering' questions which meant that I could miss out all of the irrelevant stuff.
CAB staff (and some local library staff) are always happy to help people with no internet access (or limited online skills) fill in such online forms.