PB00 and BASB how it links

Question

Hello,
When we create PO and with Taxcode  "S1" , then system will show all the taxes in "Tax tab", Here we may saw "BASB condition type , What ever the base value of the PO is their, that wil copy in to BASB value, how is it possible. How the system will link that?
If suppose.
in Pricing PB00  = 1000
and ZMAT 2%=    20 ( Tool Amortization charges).
Business needs that they want all the excise values should calculate on 1020 INR, not on 1000 RS.
But, when we were created the PO, and used the tax code "S1", then system was only showing "BASB" value 1000 INR, it should show 1020,
why bcz  all the excise related taxes were calculated based on "BASB" condition type.
Thanks and Regards
sapman man

Answer 1

Hi,
You need to check setting in calculation schema for condition types PB00 & ZMAT where all  placed properly with a  logic for calculation ---how total price will be(NET PRICE in PO) & specially check properties of ZMAT condition type.
Concept of tax in purchasing started with tax code which is in PO ( invoice tab  in item details)where  the tax code links calculation schema to tax calculation procedure.
The NET PRICE in PO is transferred to tax procedure as  "Base amount" by maintaining(which is a base to calculate tax further) base price (BASB) with 362 routine in tax procedure (OBYZ).
As in you case you have Gross Pricing PB00 = 1000 and ZMAT 2%= 20 ( Tool Amortization charges) where 2% Tool Amortization charges is added to total cost of PO as NET PRICE.  Keep ZMAT condition type(M/06) Plus/minus fields as A  in controldata-1 segment. Do setting as for your specific requirement in calculation schema(M/08)
Steps-Couu2014Condition type--Cond Descri--- -
From -
TO
10----0PB00 Gross Price--
20----0 ZMAT -Tool Amortization charges -10--
30----0TOTAL1020--
Now create PO with tax code S1 and check how tax calculated with base price 1020 INR
Regards,
Biju K