Why can i not reset my security questions via e-mail?
Why can't i reset my security questions via e-mail? There is a page on how to do it but you can't actually fill the form out.
iPhone 4, iOS 7.0.4
if you are referring to the HT5312 page that you posted from then that only contains instructions for what to do, it's not a form.
To reset your questions yourself you need to already have a a rescue email address (which is not the same thing as an alternate email address) set up on your account - you can see if you do by following the steps on that HT5312 page i.e. go to https://appleid.apple.com/ and click 'Manage your Apple ID' on the right-hand side of that page and log into your account. Then click on 'Password and Security' on the left-hand side of that page and on the right-hand side (if you have a rescue email address) you will see an option to send security question reset info to your rescue email address.
If you don't have a rescue email address (you won't be able to add one until you can answer your questions) then you won't get the reset link on that page - you will need to contact iTunes Support / Apple in your country to get the questions reset.
Contacting Apple about account security : http://support.apple.com/kb/HT5699
When they've been reset (and if you don't already have a rescue email address) you can then use the steps half-way down this page to add a rescue email address for potential future use : http://support.apple.com/kb/HT5312