I am not able to log into my account using the web browser. I am asked for a text confirmation code but this never arrives. I have checked for blocked numbers.

Try this workaround. Hope it works.

https://quickbooks.intuit.com/community/account-management-35/quickbooks-2fa-sms-verification-code-not-arriving-carrier-specific-fixes-uk-and-international-376339

I recommend reaching out to our Intuit Experts for a deeper investigation into why you can't receive the verification code to access your QuickBooks Online account. Because this requires looking into specific logs or backend details, our support specialists are best equipped to help. You can reach them by using a test drive account.

Here’s how:

1. Open the test drive account and click the Help  icon.
2. Enter Contact us or Talk to a human.
3. Type in your concern when asked.
4. Choose between Get a call or Invite to chat.
5. Follow the prompts to proceed.

Leave a comment below if you need further assistance logging in to your QuickBooks Online account.