".TB_PREF."tax_types.sales_gl_code, ".TB_PREF."tax_types.purchasing_gl_code
FROM " .TB_PREF."tax_group_items, ".TB_PREF."tax_types, ".TB_PREF."tax_groups
WHERE " .TB_PREF."tax_groups.tax_shipping=1
".TB_PREF."tax_types.sales_gl_code, ".TB_PREF."tax_types.purchasing_gl_code
FROM " .TB_PREF."tax_group_items, ".TB_PREF."tax_types, ".TB_PREF."tax_groups
WHERE " .TB_PREF."tax_groups.tax_shipping=1