I appreciate the screenshots you've provided, @rosegold1.
By default, QuickBooks Online (QBO) categorizes shipping charges as a line item since you didn't import your existing Square product and service items.
For QBO to use the same product and service item you use in Square, you'll want to import them in your QBO. Let me guide you how.
- Open Square and export your products and service as .csv.
- Login to your QBO account.
- Go to the Gear icon.
- Select Product and Services.
- Select Import from the New drop-down menu.
In the meantime, you can edit the shipping charge and delete the Discount line item in the invoice and enter the whole discount amount in the Discount percent field. See the attache image below.
I've also added this article for additional reference to know more about sync square in QuickBooks Online (QBO).
Don't hesitate to leave a comment below if you have other questions with your QBO. I'll be around to help.