Hi Haradev,
can you check Financial Accounting: Procedure for Line Item Extraction - InfoSources in Accounts Receivable and Accounts Payable Accou… , this is actually a very comprehensive documentation about the financial extraction and how to achieve data loads for the current day.
I can confirm that a lot of customers are actually using it and it works. You can even extract the financial data minute based (SAP Note 991429).
Best regards,
Andreas