Hi there, @Sandra Showalter.

Let me help show you how to add an additional sales tax in QuickBooks.

Here's how:

1. Go to Taxes and click Sales Tax.
2. Click the Add/Edit tax rates and agencies on your Sales Tax Center.
3. Select New tab to add a new tax rate.
4. Fill in the details on the New Sales Tax Rate window.
5. Once done, click Save.

On your transaction form, you can select the correct sales tax rate by clicking the drop-down arrow for the sales tax field.

That should do it. I'll be here to help if you have other questions about sales tax. Have a good one.