How can i add multiple tax to one invoice amount

Hope you're doing good, @accounts497.

I can guide you on how to add multiple tax rates to the invoice.

You can add a group rate through the Taxes menu. This way, you can select multiple rates on your invoices.

1. Go to the Taxes menu.
2. Click on Add tax and select Group rate.
3. Enter a Group Name, Description, and select the Tax rate you want to add.
4. In the Applicable on drop-down, select which amount the tax be applied to.
5. Once done, click on Save.

Check out this article to be guided in creating andmanaging invoices for GST.

•  How to customise your invoice in QuickBooks to make it GST compliant.
• Create invoices in QuickBooks Online 

I'll be around if you have further concerns about QuickBooks and taxes. Have a great weekend!