Upload Tax Book Interface question in Oracle Assets 11i

I have a FA question that I thought I need help with

In Oracle Assets 11i, I have a FA Corp Book with 4 attached Tax Books. I plan to run Initial Mass Copy as of Dec-14 and then use the Upload Tax Book Interface to populate the Cost, Accumulated Depreciation, YTD Depreciation, Net Book Value etc. These values are as of 12/31/2014.

Once this is done, I would need to run Depreciation for Dec-14 to close the FA period. This would, however, lead to doubling of the Dec-14 depreciation amount. Is there a way to avoid this?

My second question is that once the above is done and we move to Jan-15, and I change the depreciation method in Jan-15, the result would be that FA would re-calculate depreciation for each asset from the date placed in service, compare it with what has already been calculated and charge the difference in the month of Jan-15, assuming the Amrotize checkbox is not checked. Is this correct?