We're unable to cancel sales tax in QBO, but we can
inactivate the rates so they won’t deduct on your sales transactions. I’ll be glad
to show you how:
Go to Taxes.
Click the drop-down
arrow next to the tax name (see screenshot 1).
Select Edit rates.
In the ACTION column, click the drop-drop
arrow next to Edit of a certain tax
rate (see screenshot 2).
Choose Make Inactive.
Feel free to post again if you have other questions with sales tax.