Do you need to change your password because you cannot log into your account? If that's your situation, see the info I left you below on how to recover access and reset password.
If you can you log in OK but electively want to change the password in your account profile settings, we can tell you how to do that in your Intuit Account settings.
So for now I'll tell you what to do if you can't log in. It's also possible that you have more than one online account without realizing it, which could cause a password failure.
To get a list of your User IDs, reset password, and recover account access, etc., you can use the tool at the link below. When using the Account Recovery tool, try using your phone number first if you can still access it. After that, if necessary, then run the tool on your email address(es) you can access.
NOTE: Before running the account recovery tool below, log out of all Intuit accounts including this user forum, or you might end up in a loop. Then clear your browser Internet cache, close your browser, then reopen it, and go to the link below. You may wish to copy this link so you can paste it into the new browser session.
https://myturbotax.intuit.com/account-recovery
If still no luck after running that on your phone number you can still access and email address(es) that you can access, here's another method:
Go back to the tool again, but this time leave the data field blank, scroll down a bit, then choose the small blue link that says "Try something else"