How to compute deferred tax assets

Provision for taxation is Rs. 1,40,000 and Advance Tax is Rs. 2,20,000 in the TRIAL BALANCE and it is said create provision for current tax Rs 70,000. During the year, income assessment of an earlier year is completed at Rs. 35,000 against which provision existed Rs. 27,000 (advance tax paid for that earlier year was Rs. 13,000), appeal was not filed with higher authorities. 

I found the above problem where it is asked to compute deferred tax assets. Can anybody with help me by advising how to compute it??

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