What? There is not a sales tax rate on a W-2. Your W-2 shows the wages you earned and the amounts withheld for Social Security, Medicare, and federal, state and local tax, etc. There is nothing about sales tax on a W-2.
https://www.forbes.com/sites/kellyphillipserb/2018/02/21/understanding-your-tax-forms-2018-form-w-2-wage-and-tax-statement/#60aa66925aff