When you use the standard mileage rate it includes the depreciation so if you switch to the actual expenses you have to compute the amount of depreciation taken each year you used the standard rate ...
Depreciation Adjustment for Standard Mileage Rate is done on a cents per mile basis...
Year Depreciation per mile 2016 > 24 cents per mile
2015 > 24
2014 > 22
2012-2013 > 23
2011 > 22
2010 > 23
