Hello @Bnguyen1,
You'll want to turn off the automated sales tax first before importing your invoices at once. This is the reason why you receive such an error message when uploading them.
- Go to Taxes.
- Select Sales Tax Settings.
- Click Turn off sales tax.
Lastly, here's an article you can read for ideas about what other lists you can import: Move your lists to QuickBooks Online.
Keep me posted in the comments if you have any other questions. I'll be happy to help.
