I'm here to help you add a multiple tax rate, kmanning-eagle-y.
You can follow the steps below in order to do it:
- From the Taxes tab, select Sales Tax.
- Click the Sales tax settings hyperlink.
- Go to the Custom rates section.
- Click the Add rate button.
- Select either Single or Combined.
- Enter a Name, and then select an Agency.
- Enter a Rate.
- Click Save.
I've also added these screenshots as your visual guide:


When you're ready to create an invoice, you can check this article: Send online invoices.
I'm just a post-away if there's anything that I can help. Have a great day ahead!