1. Go to https://accounts.intuit.com/index.html and sign in.
  2. Select Edit to change your user ID or email. You must choose a user ID that we do not have on file.
  3. Select Security from the left menu to edit your password.

If you want to switch to a user ID that you use for another Intuit product, or you want to consolidate multiple companies under one login, see How do I consolidate my companies under one user ID? 

If you forgot your login information, follow the instructions in Forgot User Id or Password for QuickBooks Online.