Why does my product price on an invoice on the computer show as including GST but when I email the invoice, it shows as excluding GST with the GST added at the bottom?

I'd be happy to share information with you that could help you correct your emailed invoice. Welcome to the Community and thank you for posting here in the forum.

It could be that those invoices created are without GST. You'll want to double-check and ensure the GST is applied to those invoices. You can customise a report to show invoices with missing GST. Correct your invoices to get accurate records for accounting and tax purposes.

1. Go to Business Overview and select Reports (Take me there).
2. Enter Transaction List by Date in the search field.
3. Choose Customise.
4. From the Report period ▼dropdown menu, select the correct date range.
5. From the Rows/Columns dropdown, select Change columns, then select GST.
6. Click Run report.
7. Select each invoice that has no GST.
8. Add the GST and select Save.

You may visit this article about GST Overview for QuickBooks Online for additional information: GST Overview for QuickBooks Online.

Moreover, you can utilise this article to learn how to personalise and add specific info to your sales forms: Customise invoices, quotes, and sales receipts in QuickBooks Online

For additional QuickBooks-related concerns, don't hesitate to post them here in the Community. We're always available and willing to lend a hand to your queries. Have a great day ahead.