How to find the job and its location

Guys;
I first I thank you for helping me few times in the past;
A job runs every day at 8AM and looks for a file �abcd.txt� in directory �/usr/task/tmp�. How to find the job and its location. I need to change the file name to �abcd.dat�. it is UNIX environment.

if the entry is made in cron. view cron file by typing crontab -l
or use which <filename> or use find command

crontab -l helped me to find the Job that I wanted; Thank you so much;