Dear Sir,
As per the information provided by you, it appears that you are a Non Resident in India. As per the Income Tax Laws you need not file IT returns if no income is generated in India for NRI. But many SEBI laws make IT returns mandatory for investment purpose.
Plus since you may have a PAN, so again it is advisable to preferably file your IT returns to avoid complication or notices by the Income Tax Authorities.
Trust this clarifies your query.
Please feel free to call/ get back in case of any further clarifications.
Thanking You.
Regards,
Rohit R Sharma
BCOM, ACA, LLB-GEN, CERT. FAFP