He's probably confusing his cities. Santa Clara has a 0.25% city sales tax, among other cities in the county: https://www.salestaxhandbook.com/california/rates/

He's probably confusing his cities. Santa Clara has a 0.25% city sales tax, among other cities in the county: https://www.salestaxhandbook.com/california/rates/santa-clara-county https://www.salestaxhandbook.com/california/rates/santa-clar... San Mateo county also has a few cities with their own sales tax: https://www.salestaxhandbook.com/california/rates/san-mateo-county https://www.salestaxhandbook.com/california/rates/san-mateo-...