I have the same problem. Per another post, I escalated my support case to the Office of the President.https://www.intuit.com/company/contact/office-of-the-president
See the two related threads below. Multiple people are having the same issue.
https://quickbooks.intuit.com/learn-support/en-us/other-questions/sales-tax-center-sorry-an-error-oc...
https://quickbooks.intuit.com/learn-support/en-us/taxes/is-anyone-else-having-problems-with-the-sale...
