If i file an income tax after 25 year

Since TDS on your salary appropriately deducted, it is not mandatory to file separate return subject to you don't have any other income (which is very unlikely).

It is recomonded to file ITR even though your you don't have to pay any tax.

You can only able to file ITR for previous two years. Can not file for last 25 Years. So start filing Income Tax Returns from this year. For more info you may contact me at sharda.akshay @ yahoo.com