Your legal requirement for this tax report is very open for any misunderstanding and trust me it is really taking time to make an analysis and implement the change because SAP is not supporting it in most cases. That’s why our expectation was that a full scope test is done from your end. Because you are the expert for this part. But now as I see your mail below, there is a missing scenario which was not proceeded during UAT phase.
We need to make another analysis for this requirement with ABAP team and will define the best way for delivery whether via PBI or CR. And please notice that next week is bank holiday in Turkey.