Hi Experts, Our client reported that they are not able to view any addition, adjustment, retirement

Hi Experts, Our client reported that they are not able to view any addition, adjustment, retirement in Tax Book even after running Periodic Mass copy. After initial analyze we found that the particular Tax book period was not open. So we suggested to close the TAX books to get the up to date data. But now there question is if the U.S. Government changes the tax laws and allows bonus depreciation to be taken on certain assets for that calendar year so how they will adjust that. Please let me know if we can pass manual entry in closed TAX book period.