If you've managed to open multiple Twitter profiles over the years, you may decide the time has come to do a bit of housekeeping. Deleting inactive Twitter profiles you no longer use will make it easier for people to find and follow your active accounts and keep your online footprint nice and tidy.
Log in to the Twitter account you want to deactivate and select "Settings" from the "Gear" icon drop-down menu at the top of the screen. Select "Choose a new username" in the username field and "Change your email address" in the email address field to change your account details. You'll need to do this if you want to open a new Twitter account with your current log in credentials. You'll need to confirm the alterations you make by clicking a link in a confirmation email sent to your alternate email address. If you don't want to open a new Twitter account using your current details, you can skip this step.
Go to "Account settings" and click on "Deactivate my account" at the bottom of the screen. Read through the deactivation information presented and click on "Okay, fine, deactivate account."
Enter your password again when prompted to verify you want to deactivate your account. Twitter will retain your data for 30 days, during which time you'll be able to reactivate your account at any time if you wish to do so. After this time, all your previous tweets and any other data linked to your profile will be lost. Some of your profile's content may be available on Twitter for several days after you've deactivated your account. Your Twitter feed should be deleted within a few minutes.
If you go for six months or longer without logging in to your account and posting an update, Twitter may permanently remove your profile for prolonged inactivity. You can't deactivate Twitter accounts from mobile devices.