3 months salary from aborad and it return filing in india

Dear CA Professionals....Good Evening

My Father doet not have JOB from Ap2016-Sep2016

He has got a contract job Rs3Lakh per month (Total Rs9L) in Qatar from Oct2016-Dec2016

Jan2017 he will be come back to India.

Please let me know the following points

1. Shall he file IT return for these Rs9L salary or not?
2. If yes, then IT return is a NORMAL procedure or not?
3. If it is NOT normal...how?
4. Any other points (if I missed to ask here wrt this scenario)

I am very thankful to your advises

cheers

Balaji Subbu