Recently we have implemented Retro Billing process and it is working fine only if user creates retro Bill for invoices created after July 2017 i.e after GST Implementation.
In VFRB, if billing date is before July, In that case Net value is calculated after adding BED. Please have look at the following calculations:
Net value = 110 after BED addition i.e 10....Here, system should consider 100 at the time of PDIF calculation instead of 110.
Any ABAP's advise , who have worked in similar scenario. That's why tagging ABAP also.
Please note: before this issue, I have faced many error for invoices created before july due to GST. Which I'll share in detail later. For this, I have checked with ABAPers and they are also not able to do anything relevant in this.Also,no such document is available in OSS Note which explains where we can change the calculations for PDIF.