Welcome to the Community, Ram.
I'm here to assist you in accessing and guiding you through the process of updating your email account in QuickBooks Online (QBO).
To update your sign-in email information in the Intuit Account Manager, you can follow the steps below:
- Log in to our sign-in page: Intuit Account Manager.
- Select the Sign in & security menu.
- Make your changes in the Email address section.
- Once done, click Save.


On the other hand, you can refer to this article and follow the steps to change your login credentials if you've already signed in to your QuickBooks account: Change sign-in information in QuickBooks.
Moreover, I'll share this information in case you want to make changes to your payment method or account information in QBO: Manage your Intuit Account online.
Cheers to an updated and efficient QuickBooks experience, Ram. Please know that you can always revisit this thread if you've further questions about updating your credentials in QBO. We're here every step of the way.