Billing Vat extract detail table usage.

Hi All,

We have a requirement to display the vat detail level information in our custom invoice template. Currently, the system is populating the vat % as the sum of the detail level in the extract tables. When we looked at further, vat extract detail table BI_EXTRCT_TXDTL is not populating any data as of now. It is populating from one of the temp table and that temp table is not populated anywhere in the app engine program. Could any one help us to understand the usage of this BI_EXTRCT_TXDTL table and on what condition this table will be populated. Is there any