Tax Code Creation

Dear All,

I want to create new tax code. Please provide step-by-step detail u2013 document for creation of tax code.I don't want to create tax code by copying other.

System display bellow error at the time of FTXP u2013 Define Tax code

u201CCalculation procedure not maintained correctly for level 000 Message no. FS789u201D

If any one have tax code creation document, Please provide.

Regards,

Mahesh Wagh.