This report is available when Integrate Accounts and Inventory is set to No in the Company Features screen.
It displays Opening and Closing Stock figures from the ledger account master, rather than the inventory records. Hence, it is possible that Stock Summary and the Stock Group Summary report display different figures.
To view Stock Group Summary:
Go to Gateway of Tally > Profit & Loss Account > Opening Stock (or Closing Stock)
Drill-down from Stock Group Summary to view the Stock Ledger account where you can manually key in the closing balance for a given date. You can enter the closing stock figures for different dates.
The date for the closing balance is the beginning from date and till date. If there is no date that follows the last, then that Closing Balance continues. A blank against a date signifies zero balance.