QuickBooks Online (QBO) masks sensitive information, including a supplier's complete GST number, except for the last four digits, Brig99. However, we are able to generate a report that displays these details for your suppliers. Allow me to guide you through the process.
The Contractor Info report includes all the contractors you are monitoring. With this in mind, let's access the T5018 Contractor Info report to check the GST tax number of your suppliers.
Here's how:
- Go to the Reports menu.
- Scroll down and look for the Expenses and Suppliers section.
- Click the T5018 Contractor Info report.

- Filter the dates as necessary.

For further information on personalizing the report, refer to this article: Customize reports in QuickBooks Online.
Additionally, I'll provide these links to assist you in managing supplier transactions in QuickBooks:
If you require more help with accessing the GST tax number or have questions about QuickBooks, please feel free to ask in the comments, Brig99. I'm always available to provide additional support whenever you need it. Have a fantastic day!