How do i delete the sales tax deduction once it is in there?

You go back through the questions and leave the sales tax rate blank. 

Go to Deductions & Credits:

>Estimates and Other Taxes Paid,

>Sales Tax,

>Enter all my Receipts,

here you can remove your sales tax rate and leave it blank.

Or

You can delete the worksheet:

To delete the form:

Log into your Federal return, click on 

Tax Tools,

Tools,

Delete your sales tax form. Delete all worksheets associated with this form also.