What is Taxability of a compensation received by an employee on termanation of job by Court order

Depends upon the order, whether one time compensation  or for salary of different years.

Sir its Slary for Last Four year only

So, it can be break up in corresponding years as arrears, by filling form 10E

the whole of income is taxable subject to relief u/s 89. But exemption u/s 10(10B) can be claimed if the compensation is paid under Industrial disputes act to a workman.