Allow me to provide more information about the shipping address box. This box prefills will the customer's information that is saved in their profile. You can check their info by following these steps:
Go to the Invoicing tab and select Customers.
Find the customer's name who's shipping address you need to correct and click on it.
In the top right-hand corner, choose Edit.
Verify their shipping address is correct, make any necessary changes needed, then press Save.
Now you can create the Invoice for the customer again and make sure the shipping address is right, so the sales tax calculates accurately. If you need any additional information about sales tax, you can check out this article about how QuickBooks calculate sales tax.
Please don't hesitate to touch base with me here if you need any additional assistance. I look forward to hearing from you again.