Good Evening, @AnthonyLew.
Thanks for reaching back out to the Community. I hope your day is going well.
Depending on the information that's listed in the Excel CSV file will determine if the file will upload successfully to QuickBooks. Any information coming from a third-party will have to be configured outside of the system. However, my colleague gave some helpful steps on how to resolve this problem with sales tax.
Here are a few articles that may come in handy in the future for your business:
After doing the steps my colleague provided, you should be able to get back on track with your business. Should you need any further assistance, don't hesitate to ask. I'm always here to lend a helping hand. Have a great day!