county sales tax question

Hi, we need to capture county sales tax for a particular state NJ for about 10 different counties. So we have sales codes for hudson 7.5%, Ocean 8% etc., Also we have item sales tax codes applicable to these counties only for certain item groups say “Fabrics” and “Linen” are 4.5% and 4.8% respectively.

  1. So when we create a sales tax group, do we need to create 10 different groups each correspond to a particular county?

or we create one sales tax group and add 10 different sales tax code each correspond to the county?

  1. Similarly for item sales tax groups, do we need to create the group for each county or one group with two item sales tax codes that represent each item groups?

Thank you