Hi, Kamal. You should set up GST so that it appears as a separate line item on your invoices. Let me walk you through how to set it up in QuickBooks Online.
Here's how:
- Go to All apps, then select GST.
- Click on Overview and hit Get started.
- Then Set up GST.

This is how your invoices will look once GST has been set up.

Please note that once you turn on GST in your QuickBooks company by setting up your BAS in the GST section, you won't be able to turn off GST in the future.
If you have any additional questions, please don’t hesitate to reach out. We're always here to assist you.