As-22 deffered tax

No you can't reverse the DTL to the extent of the reduction in surcharge.  This is because, DTL is being created by applying the applicable tax rate for that year.  In the subsequent year, again iof the DTL is requried to be created, then it will be created by applying the tax rate of that year.

So I don't think ti would be prudent to reverse the DTL on account of change in surcharge in teh subsequent eyar.

Thanks Mr. Giridhar for your reply.

I think when we follow the Balance sheet approach for DTL, wherein we work out DTL/DTA by applying current rate to the accumulated timing differences of the previous years and charge the difference between the opening balance and amount so arrived in the current year,to P&L A/c,  the difference on account of change in rate of surcharge will be automatically taken care of.

However, if we follow P&L approach for DTL/DTA, wherein we work out DTL/DTA by applying the current rate to the timing difference for the year only and then either adding/subtracting the same from the opening DTL/DTA,the opening balance should be adjusted to the extent of change in rate of surcharge.