Accounts are permanently deleted 30 days from the date they were deactivated. After 30 days, deactivated accounts cannot be reactivated. If it has been less than 30 days, follow the steps below to reactivate your account.
To reactivate your account:
Visit twitter.com/login on the web (reactivation is not supported on mobile devices).
Enter your account username or email address, and your password.
Once you click Sign in, your account is reactivated.
You'll see your home page if reactivation was successful. Your account data (such as Tweets, followers, favorites, etc.) may take a few minutes to fully restore.