Hey there, @LilianaE.

Thank you for sharing your concern in the QuickBooks Community.

If you already tried all of the basic troubleshooting steps shared in this thread and still getting a similar result, I'd recommend reaching out to our QuickBooks Support Team. They have the available tools that could update the phone number in your Intuit account. This way, we can ensure you can get a verification code and continue your business.

Here's how you can reach out to them: 

1. Click the Help menu in the upper-right hand corner and click Talk to a human.
2. Type in "Talk to a human", then press Enter.
3. Look for I still need a human and click on it.
4. Select Get help from a human.
5. Choose between Chat with us, Schedule an appointment, or Have us call you.

You can also view our support hours to ensure that we address your concerns on time.

Also, our articles might have something that can help you with your QuickBooks concerns, too. Just click this link and make sure that the topic is set as "QuickBooks Online."

Let me know how it goes by adding a comment below. I'm more than happy to lend a helping hand. Keep safe!