Hi gladiusraj, I really dont know any other substitute for these documents...
May be PF statement will do, but again it is possible when PF is deducted from your salary every month... So for that you also need to attach payslips...
, another way can be submitting form 16 for ur emplouments...
But why to take risk of getting application returned or waiting for missing documents letter...!
Filing zero tax return in India is very easy and it is tax season (march-ending), so you can very well consult ur CA and ask him to submit ur tax returns for past 2-3 years. Get the copy of this tax return from him and attach it with ur application. In india, now u can do it onlie also by yourself.