After you file

i checked the only other email i might have used in the past and there was no account associated with it. The notice i see on the screen for my existing account is "Though the October 16 deadline to file has passed, we can still help you file a 2016 tax " which is a bit unsettling since i was confident that i had filed correctly and completely already. i received a refund so what am i not understanding? how can i receive a refund if i did not file?