how to find the right table for custom reporting

hi,

my users keep on requesting reports on iexpenses by employee but i don't know the right table to get the data.

kindly assist me to get the right table.

my users would like to have report on

employee number,employee name,amount,invoice date,amount paid,gl account

we are currently using ebusiness suite 11.5.10.2 which consist of gl,ap,ar,fa,p2p,ce and intertet expenses,

kindly assist.tq