US Sales Tax configuration in Tax Module

Organization Name (Required - If you are an Oracle Partner, please provide the organization you are logging the idea on behalf of):

Trinamix System Private Ltd.

Description (Required):

We are planning to implement US Sales Tax for 42 states. We would like to know the right approach to implement this in Fusion Tax module. Please suggest, do we have to create combine Tax Rates (State, County, City and Zip Code) or Separate Tax Rates for State, County, City and Zip Code

Use Case and Business Need (Required):

We are planning to implement US Sales Tax for 42 states. We would like to know the right approach to implement this in Fusion Tax module. Please suggest, do we have to create combine Tax Rates (State, County, City and Zip Code) or Separate Tax Rates for State, County, City and Zip Code