In all government and semi-government organizations, banks, autonomous bodies and corporation tax deducted at the time of payment of salaries. Mostly private organization also deduct tax at the time of making payments for salaries. Hence it is general misconception among the salaried individuals that they are not required to file the tax return.
But as per tax laws, salaried individuals are liable to file tax return of every year, if you want to save your for any action by tax authorities it is mandatory for you to file your tax returns with FBR. All local authorities and Excise & Taxation Offices file data with FBR for sale /purchase and transfer of property and cars/vehicles. If a salaried person enters in transaction of sale or purchase of property or car and he is has not been filing tax returns then a notice will be issued by FBR to file returns with documentary evidences.
As tax deducted and deposited by the employers then it is the only responsibility of salaried person to file tax return.