Hi there, @powerwashclean. 

Welcome to the Community. Let's change the code to Out of Scope so the GST will not calculate. Here's how: 

1. Go to the Gear icon, then choose Account and Settings under Your Company.
2. Choose the Advanced tab on the left panel, then click the Pencil icon for Accounting.
3. In the Default tax rate selection section, click the drop-down to select Out of Scope.
4. Click Save and Done.

The next time you create any transactions, it will not add the GST. 

Here are additional resources that provide an overview of how to set up the GST and edit the tax rate:

• How do I?
• GST Settings Overview

If you have further questions, post a comment below. I’m here to help you.