Welcome to the Community, @KGulliford. I'm here to lend a hand with changing a password.
A user can update their password from within QuickBooks Online with the following steps:
For additional information on this process, such as how to change it at accounts.intuit.com, please see the following article: How to change your user ID or password.
That's it. I'm sure you'll have it updated in no time.
I'm a comment away if you need further help with changing the password or anything else. Hope you have a good rest of the week.