Yes, prior depreciation is the sum of all depreciation claimed over the period the asset was used by your business. You will need a total for both regular and AMT depreciation, which are usually the same but can differ depending on your tax situation.
If you used TurboTax last year, look for the Depreciation and Amortization Report and the Alternative Minimum Tax Depreciation Report included in your return. Your prior depreciation at the beginning of the current tax year is the sum of "Prior Depr," "Current Depr," "Section 179," and "Special Depreciation Allowance" shown on the prior year reports on the line for the asset you sold.
Note that the depreciation equivalent is applicable only for years when you used the Standard Mileage Deduction for the vehicle. See this post for more info: What is "depreciation equivalent for total miles"?
@Sean1010
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
