Why would gst suddenly not be calculated / added on my invoices despite showing up in as being my set tax thing?

Hello, @bassanoautotrans. Please know that GST not appearing on your invoices can be due to incorrect tax settings or a browser-related issue affecting QuickBooks Online (QBO) functionality.

To begin, could you share more details about why the GST wasn't added so we can better understand your concern? Are you referring to GST not appearing in the sales tax dropdown or a different tax code being displayed on the invoice?

When creating an invoice, the default tax code for the selected item or customer is automatically applied. However, you can edit it to choose GST or a different tax code. If GST isn’t showing in the dropdown, ensure the code is active.

If it is still active, I recommend logging out and back into your QBO account to refresh the system. Additionally, you can use a private or incognito browser or switch to a supported browser to help ensure smooth functionality when managing sales tax in invoices.

Feel free to reach out if you have any additional questions. The Community forum is always here to assist you.