Not only County, but City and Special District. We maintain California tax tables by updating Schedules/Codes with every change. Provided the client uses our Tax Schedules/Codes, we can copy ours to replace theirs. For Exemptions, it is as @JimWoodhead says, or manual entry. Using NONTAX may make it more difficult for sales/use tax return preparation because there are separate lines for non-taxable vs tax-exempt sales.