Hi there, Richard.
Thank you for reaching out to the QuickBooks Community! I understand you signed up for QuickBooks Online and now wish to transfer to QuickBooks Desktop. While the QuickBooks Desktop Bahamas version isn’t officially available, you can still use the US-based QuickBooks Desktop.
We also recommend contacting our support to help you with the migration since your QBO data is in a different region from QBDT US. You can call our QuickBooks Desktop US support team for your QBDT migration or our QuickBooks Online Global support team for the sign-in error you experienced.
Moreover, you can also drop the error message you encountered here on the community page so we can help you fix it.
You can check out this article to learn how to get started with QuickBooks Desktop: Get started with QuickBooks Desktop.
If you have further concerns besides transferring to QBDT, please do not hesitate to post here on the community page. We're here to help you every step of the way.
