F12: Configure and F11: Features help you to organize the information and the level of details as per requirement. You can modify/alter the settings in F12: Configure and F11: Features at any point of time
Go to Gateway of Tally > F11: Features > F1: Accounting Features
There are various settings available under Accounting/Inventory/Statutory & Taxation Features, which determine the information to be entered in transaction entries.
Refer to F11: Company Features in Tally.ERP 9 for more details.
To set F12: Configure for Accounts and Inventory Masters
Go to Gateway of Tally > F12: Configure > Accts/Inv Info.
By default, Accounts/Inventory Masters settings are set to No. Features that you require can be set to Yes. Typically, they are additional fields that appear during Masters Creation which enable you to obtain more information and detailed analysis.
Refer to Accts/Inv Info. Configuration for more details.