Hi ccaffrey, I can see how important to use the Import invoices feature in QuickBooks successfully.

At this moment, we're unable to turn off the Sales tax feature since we activated it and used tax agencies and custom rates. Thus, we'll see an error message when utilizing the Import invoices.

Let's send your valuable feedback to our Product Development team. Sign in to your QuickBooks Online account and share your insights about importing invoices and turning off the automated sales tax. I'll show you how:

1. Go to the Gear icon.
2. Select Feedback under Profile.
3. Enter your suggestion. Then, click Next.

Alternatively, we can use a third-party application to help achieve in importing invoices. We can go to our website to look for third-party software compatible with QuickBooks: QuickBooks Apps Store.

We can visit these articles to learn more about handling sales, income, and customers in the program:

• Invoices and payments
• Sales and customers

Let me know if you have other concerns about importing data and managing sales tax. I'll help you in any way that I can.