Hii, Hope from the above explanation you'd have understood what deferred tax asset and liability is. so in case of deferred tax asset, it means you have paid extra tax for which the benefit accrues in the future. For example, suppose an asset is depreciated at the rate of 25% as per Companies Act and 10% as per IT Act, then it maeans you can claim deduction only to the extent of IT depreciation, thereby your profit increases and you end up paying extra tax. For that extra tax paid now, the liability arises on the forthcoming years. So to the extent of increase in the profit is due to the lesser deduction of depreciation expense. so while creating DTA, P&La/c is credited and DTA is debited. In the forthcoming years reverse entry would be passed to write it off.