SAP Note for Tax error while creating SC

Dear All,

We have following scenario,

We don't have any tax data for SC, even Tax code filed is removed while creating SC.

we have done following configuration for this.

SPRO---SRM SERVER----CROSS APPLICATION BASIC SETTING----TAX CALCULATION----DETERMINE SYSTEM FOR TAX CALCULATION

  we have selected NO TAX CALCULATION,

however we want to use central contract in SRM for which tax need to calculated from ECC .

Please suggest OSS notes for above scenario, (SRM with No Tax calculation and central contact with tax and  ''Tax calculation occurs in backends)

or any other alt to impernativelement both scenario

Kindly Advice,

Thanks and Regards,

Pramod