Data issue at TB level

Hi All

I have one situation where in my client is preparing financials both standalone and consolidated by downloading TB extracts from SAP(F.01) and arranging it according to Schedule VI(Indian Listed Company).

I have suggested them they should cross verify all TB details with GL summary(RFSSLD00) and then prepare the financials, but they are saying TB is giving the same information.

I want to put some check at preparation level, can anyone suggest me what could be the data issues that can possibly happen at TB level and which can be avoided by comparison etc. with other reports.

Regards

Aditya