Let me share additional details about Square, ccraig-stemania.
QuickBooks Online is unable to modify the imported transactions. I suggest reaching out to Square's Support so they can investigate why this happened. That way, they can also check if they have an option to exclude the incorrect sales taxes.
I've added these articles to learn more about how the integration between QuickBooks & Square works:
Please comment again if you need more help with this. I'll be here to assist you.