How do I fix error "You'll have to update your software to access your Intuit Account here" ?

I commend you for making your first post here in the Community. Welcome, and I will help you transfer your QuickBooks Desktop data to QuickBooks Online.

QuickBooks is developing a new migration method that will make moving your data from QuickBooks Desktop to QuickBooks Online as simple as possible. The new migration method will:

• Improve the entire transferring experience to QuickBooks Online.
• Improve the quality of data transported and expand the size of data files to transfer.

As a result, any QBDT to QBO migrations must be halted temporarily on June 16. And you can eventually move your QBDT data to QBO using the Excel CSV files.

You may refer to this article for detailed information: Why can’t I move my data from QuickBooks Desktop to QuickBooks Online?

There is no set timeline for when the migration option or tools will be available.

Migrating data from one QuickBooks to another, ensure to utilise the same International version. It prevents you from installing and using a trial version of QuickBooks for South Africa. It is due to the fact that we are temporarily terminating our Desktop offering in the mentioned location. 

I will be including this article to help you manage your business more successfully with QBO: Help guides for QuickBooks Online. It contains topics about different accounting strategies, banking, and payments.

Feel free to reply below if you need further help with QuickBooks-related concerns. Have a great day ahead!