Discrepancies in the amount of Posted Tax Amount in the Tax Reconciliation Report

We are trying to generate Tax reconciliation Report through schedule process. When we click on OK to start the Report process, we have to fill in some process details like:
*Reporting Level Legal entity (required field)
*Reporting Context (required field)

Everything was fine and going as it is expected.

Lately our client now wants to enter the Tax Registration Number (Not a required field) detail in the Process details window. From the here the problem arises.

In the report, under the Batch source: CONTRACT INVOICE, the invoices generated through Prepayment Project Contract Billing is not showing in the report anymore after we selected and populated the Tax Registration Number in the process details section of the ESS job: Tax reconciliation Report.