Filing your Income Tax Return has many benefits:
1. Compliance with tax laws, and
2. To claim tax refunds (in TDS or advance tax payments) etc.
ITR also comes in handy for:
1. Appointment to Judicial & Class One Jobs (such as that of Senior Auditor),
2. Accidental claim in Third Party Insurance,
3. Obtaining visa for immigration or under work permits category,
4. Obtaining any kind of loan from private or nationalized bank, and
5. Obtaining government tenders or for registration on panels.