To delete your sales taxes paid in TurboTax Online:
Open TurboTax Online
Select Tax Home in the left pane
On the Hi, let's keep working on your taxes! screen, select the dropdown on the right side of the Deductions & Credits box, then select Start, Continue, or Pick up where you left off
On the Your tax breaks page, you should see Sales Tax listed. Select Edit to the right
On the How do you want to enter your sales tax info? screen, select Enter All My Receipts
On the Enter Sales Tax You Paid screen, enter zero, then select Continue
On the We’ve Chosen a Deduction for You screen, if the state and local income tax deduction hasn’t been selected, select the box next to Change your deduction