sorry another one:

CASE WHEN {custitem_carton_uom} = '1' THEN 'oneunitonly' ELSE (CASE WHEN {taxcode} = 'TS-AU' THEN ({pricing.unitprice}/{custitem_carton_uom})*1.1 ELSE 'notax' END) END

just working through this one so that if

{custitem_carton_uom}

= 1 then print text, otherwise follow the formula afterwards but only if

{taxcode}

= TS-AU