Hi Carlos,
You can achieve this in following two ways...
1. SE38 --> Report Name --> Utilities --> Environment Analysis --> Select Database tables.
2. SE16 --> D010TAB --> Give the report name and execute.
Will list the tables used by the program.
You also cross verify using FM RS_TABLE_IN_PROGRAMS with table name as input, to check if the table is used by the report or not.
Regards,
Prithviraj.