Redetermine the VAT rate after item copy

Question

Hello everyone,
[Background]
I am in a project which is for VAT rate change.
We implement a new condition BADI to reset Price_date in the communication structure to change the tax date.
In the BADI we mapped varies date types(Such as Sales date) to PRICE_DATE.
so when some date type was changed the BADI will be run for new tax determination.
[Issue]
The problem is when we follow-up from a contract to a new contract or sales order, the PRICE_DATE are not changed in some cases.(Just as copy source's PRICE_DATE)
[Approach and question]
After made a investigation, we found that the issue maybe resolved in item copying control customize.
[CRM->Transactions->Copying Control for Business Transactions->Define Copying Control for Item Categories]
There is a filed that we can define condition copy rule.
- Do not copy conditions
- C: Only copy manual conditions
- D: Copy all conditions
- G: Copy conditions and redetermine Tax
By default all item category copy rule were set to C and D.
What would be the risk of setting D to G?
Is there any impact when changing D to G?
-----------------------------------------For testing purpose you can implement the BADI as below----------
[BADI Implementation detail]
1. Enable Performance-Optimized Condition Processing and Pricing
2.Define Customer-Specific Mapping of Condition Fiedls
     Add a record for PRICE_DATE, we copy it from standard and add a filter for Condtion FILLING BADI like Z00001
     The standard settings is mapping to PRICING-PRICE_DATE
     #Before using the filter you have to define it in "Implement BAdis to influence Mapping of Condition Fields"   
3.Implement a Condtion Filling badi(BADI:Filling of Condition Fields)   CRM_CND_FLD_FILL
     after determining the new Price_date, add the value to the return value  RT_ATTR_VALUE.(You shouldn't leave it as blank or condition will be lost )
     For testing purpose, you can set a constant value in it.
4.If you want to trigger your BADI when some filed changed, you have to implement a new BADI (CRM_CND_OBJ_REG)

Answer 1

Hi Hui Sun,
Your aprroch regarding copying control is right. You can keep the option D or G to copy the Pricing conditions.
And after changing the coopying control for the item categories and keep a break point in CRM_COPY_BADI in the particular Copying routine implementation and in that keep a break point  PRICING and PRICING_I methods.
The pricing will be automatically copied. if not copied then you have to maintain the Pricing using the FM in the methods of above mentioned implementation.
Please check the importing parameters and export parameters of the Methods.
Regards,
Rajya lakshmi CH