DTA - unwind and unused capital allowance

CFA Level II FRA
#1

Hi - have 2 specific questions regarding tax credits:

  1. Looking at a company that made a chunk of earnings from the unwind of a deferred tax asset from intangibles. Shouldn’t an unwind be 0 net impact on earnings or what are the steps impacting the financial statements? Or has an expense been incurred before and hence the unwind leads to the positive earnings impact?

  2. What is an DTA related to unused capital allowance? How is the DTA booked?

Thanks