How to consolidate sales tax after migration

We can inactivate those unused tax rates, Tracy77.

QuickBooks Online doesn't allow to merge two tax rates. It helps us to avoid tax return discrepancies. Good thing you can inactivate them. Here's how:

1. Go to Taxes.
2. Click on Manage sales tax button.
3. Look for the tax rate and click on Make inactive.

Check out these helpful articles about sales tax for future references: 

• Sales Tax Overview
• How to set up a new sales tax code

Just keep us posted if you still need more assistance. Have a great day!