In my case, the depreciation calculated by TurboTax throughout the years was too inflated.
I doubt it, unless you entered incorrect information into the program. What makes you believe it's inflated? Convince me.
You are required to recapture the depreciation taken, or the depreciation you "should" have taken; whichever is higher.
Otherwise, to change the depreciation requires filing IRS Form 3115-Change in Accounting Method. This form is not simple by any stretch, and professional help is recommended if you pursue this path. Especially if your state taxes personal income.
