Manage customers and income

Hi Juneeta,

Thanks for posting in the Community!

You'll have to select a GST code in the invoice to calculate GST on your transaction. Here's how:

1. Click on the + New button.
2. Click on Invoice, fill out the customer name, invoice date, due date.
3. Set a GST under Amounts are field.
4. Select a product or service, enter a quantity and rate.
5. Select the GST code under GST column.
6. Click on Save.

Check out the screenshot and link below for reference: Create invoices in QuickBooks Online.

Feel free to post again in the Community if you have further concerns. I am around to help you.