About service tax

Dear all,

Our  company basically  service provider but some time we are selling material hence we need submit MVAT return ,my question is while making service invoice that time we are charging service tax 12.36% but while filling return of vat that time we are showing labour charges of service income in that we need show service tax amount or only basic amount ,

Can we consider value with service tax or consider only basic service value in labour charges ?

so please advise of above the quries.