Hi there, @mel241.
Thank you for outlining the steps you've taken to resolve the issue. I'm happy to suggest additional troubleshooting methods to help access your client's account in QuickBooks.
To start, ask your client to delete your access to their books and reinvite you again. Doing this will refresh the connection between your account and their company. Ask them to follow these steps to delete the original invitation:
- Sign in to QuickBooks Online as a primary admin.
- Go to Settings ⚙ and select Manage users.
- Click the Accounting firms tab.
- Look for your accountant firm.
- In the Action column, select the small arrow ▼ icon and then Delete.
- Click Delete to confirm. If they see any duplicate invites, also delete those.
Once done, ask them to send you a new invite. If you're still getting the same results, I suggest contacting our QuickBooks Team. They can further investigate the issue and perform additional troubleshooting steps to fix it.
Moreover, you can check this article to see the set of tools you can use when reviewing your client's accounts: Use accountant tools and features in QuickBooks Online Accountant.
Please let me know if you have additional questions about accessing your client's QBO account. I'll be here to help you out. Have a good one.
