First thing is to check your Community Profile Personal Information (Click here) includes your name, address, current landline 'phone number and an alternate number (mobile recommended). Add, then scroll down and add into Private notes the email address and Reset details - the alternate email address and mobile number for password recovery - and then save changes.
Are you having trouble with the sign in to TalkTalk Webmail or with email on your computer or notebook or an email app on a mobile or tablet?
Do you see any error message? Problems logging in to email