Why has QBO calculated sales tax on one line of a journal this line has an 'out of scope' tax code applied.

Hi JMBN, 

Thank you for reaching out. 

GST shouldn't be calculated if Out of Scope is selected for the line. I would suggest contacting our support team for assistance with this. Please find their contact detail in this article: Get help with QuickBooks products and services.

Thank you and please let us know if you require any additional assistance.