Hi there,
Welcome to the Community. QuickBooks is designed to help you manage your accounting with ease. I'll be happy to show you how to manage the tax rate in QuickBooks.
Based on what you've described above, I editing the tax rates in QuickBooks to your liking using the steps below:
1. Go to Taxes.
2. Select Sales tax.
3. Select Manage sales tax.
4. Locate the sales tax agency you wish to work with and make the necessary adjustments.
Once you've edited/added a tax code, you can use is for your transactions so they can be recorded correctly in QuickBooks. Let me know if this info helps. I'll be on standby.