Sales tax groups that you define here become available for selection on the Commissary Definitions screen's Misc Tab in the "Sales Tax Rate" field. Different sales taxes that you defined on the Sales Taxes screen are available here to be selected as members of a sales tax group. Name the group in the Description field. The group names, as well as the sales tax names, appear in the "Sales Tax Rate" field. So for example, you could define a state tax, then a county tax, then combine the two, then select the combination to apply to a Commissary definition.