Our tax codes are 1: taxable; 2 Out of state; 3 Tax ID on File; 4 Exempt.  Tax codes 2-4 should not add tax and 1 should add tax.  Somehow 1 and 3 are mixed up.  They still say 1 taxable and 3 Tax ID on File, however, when checking someone out on an invoice 1 is not charging tax and 3 is charging tax.  I have no idea how they got mixed up.  Does anyone know how I can switch them back?