Pricing procedure to Tax procedure

Dear All,

First of all Congratulations to all for becoming world champions.

My query is i want to carry 1 (Misc Charges)condition type from pricing proc to tax proc in purchase order creation.

i want to calculate CST = Basic PriceEDMisc Charges

CST coming from Tax proc and Misc charges coming from pricing proc.

How to do now...m stuck...If routine / subtotal is the solution for it then pl. provide in detail.

Thanks in advance

Regards

Nainesh

SAP ECC 6.0