Tax condition value not getting posted with retroactive billing

Hi All

Due to price reduction from previous date, I am processing retro billing for billing documents. For target credit memo to be created, i have maintained the pricing procedure with condition type PDIF. Now when i create the credit memo with tcode VFRB, it only considers pr00 condition value for posting the difference with PDIF. Tax condition value is not being considered here.

Are there any other changes required to make in pricing procedure?

Please let me know the method to fix the same.

Thanks

Deepak Mehmi