Import invoices isn't quite ready to support sales tax

You can use an importer tool as a workaround.

If you've set up sales tax in QuickBooks Online (QBO), you won't be able to import invoices directly. I agree with Chrea about integrating a third-party application to upload them. I'm here to assist you throughout this process, E-vial.

You can utilize the Find Apps feature in QBO to discover various applications tailored to meet your business requirements. You can search for an app using keywords like "Import Invoices." Additionally, I recommend checking other sources, such as Google or Safari, to find the application you need. To do so, you can follow the steps provided below:

1. Log in to your QuickBooks Online account.
2. At the right panel, choose Apps and then click Find Apps.
3. Look for the app you wish to connect using in the magnifying glass bar or choose the Browse category ▼ to search for an app by category.

After identifying the suitable app, learn how to download and manage it by reading this article: Integrate app in QuickBooks Online.

Additionally, this material provides guidance on transferring app ownership or disconnecting apps in your QBO: Transfer app ownership or disconnect apps.

Return to this thread if you need additional support importing your invoices with sales tax in QBO. I'm always ready to assist you. Keep safe!