Hello there, @acc1vholdings-gm,

You have the option to set up and add your sales tax directly on the Taxes page. May I know if you receive an error message saying you're unable to create it?

1. Go to Taxes.
2. Select Set up sales tax.
3. Enter your business address.
4. Click Confirm.

In, addition, here's an article you can read to learn more about how you can set up your sales tax: How do I set up sales GST/VAT rates and use them on forms? (International QBO)?

Lastly, here's a few articles you can read for ideas to help manage your sales tax: Tax for QuickBooks Online.

Keep me posted in the comments if you have any other questions.I'll be here to help.