You can edit, delete or close a poll you've created by signing in with your Twitter account (Sign in link on the top/left)



PS: When you sign in, it does NOT give us permission to update anything on your account or tweet for you (nor do we need/want it.)

Then choose an poll or survey under the "Menu Options." Note that for polls/surveys for which votes have been cast, you will only be able to update the expiration date.



And change the date to yesterday (or a date before current date) and the poll/survey will be closed for new votes.