Thank you for the quick response and the details you've shared, @mld.engraving.
Allow me to join in this thread and help you set up your sales tax successfully.
Let's log in your account and set up your sales tax in a new incognito or private browser. This way, we can identify if it's not a browser error.
If you were able to set up your sales tax successfully, I suggest clearing your browser's cache to optimize it and improve your experience with QuickBooks.
If the same error exists, switch to a different browser and set up your sales tax from there.
However, if you still got the error after following the above troubleshooting steps, I suggest contacting our Customer Care Team. They can help you investigate this error and help you set up your sales tax with the screen sharing tool they have.
Please let me know if you have any other questions by clicking the Reply button. I'd be always around to help.
