I know the urgency of accessing your QuickBooks Online account smoothly, @Triciamazure33. Let me assist you in having seamless access to get you back in managing your business. 

First off, when trying to access your QBO, did you encounter any prompts or error messages preventing you from signing in? If so, please share them with me. Attaching a screenshot would also be helpful, so I can understand what you're experiencing and assist you more effectively in resolving the issue.

Additionally, since you've mentioned that this issue has persisted for three days and your QBO is already updated, I recommend contacting our support team. They have the expertise and tools necessary to investigate this matter. To reach out to our QuickBooks Support Team, visit this article for the support number or go directly to this website: Contact QuickBooks Support.

On the other hand, see this resource in updating or changing your email address, user ID, password, and other QBO account information for enhanced security: Update or change your Intuit Account sign-in information.

Feel free to share any additional information below. If you have more questions about accessing your QBO account or any other concerns, don't hesitate to tag me in the thread. I'm here to help.