Streamlining Swiss FDT Declaration

I would like to create a report similar to the summary available in fixed/intangible assets for provisions and transitional liabilities as these annexes are requested for the Swiss FDT declaration. Those reports have an opening/closing balances (!) as well as the changes that have occured during the period grouped by descriptions.

Currently I am doing it as a manual process in Excel (after filtering the journal entries by some special description prefix to identify provisions and transitional liabilities) but is there a way to do it better ?

Any idea to create reports with opening and closing balance ?

Report - General Ledger Transaction.

Thanks for hint, it is sad this report is all or one and does not allow selecting multiple accounts.